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2876 vulnerabilities
CVE-2026-103500 (GCVE-0-2026-103500)
Vulnerability from cvelistv5 – Published: 2026-09-30 17:15 – Updated: 2026-09-30 17:19
VLAI
EPSS
VEX
Title
Heap buffer overflow opening large email
Summary
An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size. This vulnerability was fixed in Thunderbird 157, Thunderbird 140.17, and Thunderbird 153.4.
Severity
No CVSS data available.
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
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}
],
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}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T17:19:56.134Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
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},
{
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},
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},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-103/"
}
],
"title": "Heap buffer overflow opening large email"
}
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"datePublished": "2026-09-30T17:15:06.357Z",
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CVE-2026-100832 (GCVE-0-2026-100832)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:20
VLAI
EPSS
VEX
Title
Use-after-free in the Graphics: Canvas2D component
Summary
Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 140.17, Thunderbird 153.4, Firefox ESR 115.42, and Firefox ESR 140.17.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 13:09 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.42 , ≤ 115.*
(rpm)
Unaffected: 140.17 , ≤ 140.* (rpm) Unaffected: 153.4 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ * (rpm) |
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"cna": {
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"providerMetadata": {
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"shortName": "mozilla"
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},
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{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-102/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-103/"
},
{
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},
{
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"title": "Use-after-free in the Graphics: Canvas2D component"
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"datePublished": "2026-09-29T12:36:35.869Z",
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"state": "PUBLISHED"
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CVE-2026-100831 (GCVE-0-2026-100831)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:21
VLAI
EPSS
VEX
Title
Use-after-free in the DOM: UI Events & Focus Handling component
Summary
Use-after-free in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 13:12 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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"cna": {
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"vendor": "Mozilla",
"versions": [
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"status": "unaffected",
"version": "157",
"versionType": "rpm"
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{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
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"status": "unaffected",
"version": "153.4",
"versionType": "rpm"
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"status": "unaffected",
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"versionType": "rpm"
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}
],
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"providerMetadata": {
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"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
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CVE-2026-100830 (GCVE-0-2026-100830)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:46
VLAI
EPSS
VEX
Title
Mitigation bypass in the DOM: Navigation component
Summary
Mitigation bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:45 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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"product": "Firefox",
"vendor": "Mozilla",
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"versionType": "rpm"
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"providerMetadata": {
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CVE-2026-100829 (GCVE-0-2026-100829)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:25
VLAI
EPSS
VEX
Title
Mitigation bypass in the DOM: Security component
Summary
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:25 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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"attackVector": "NETWORK",
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"baseScore": 9.6,
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"integrityImpact": "HIGH",
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"scope": "CHANGED",
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"vendor": "Mozilla",
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{
"lessThanOrEqual": "153.*",
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"version": "153.4",
"versionType": "rpm"
},
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"lessThanOrEqual": "*",
"status": "unaffected",
"version": "157",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
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"status": "unaffected",
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"versionType": "rpm"
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"versionType": "rpm"
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],
"providerMetadata": {
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},
{
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}
],
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CVE-2026-100828 (GCVE-0-2026-100828)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:26
VLAI
EPSS
VEX
Title
Mitigation bypass in the Bookmarks & History component
Summary
Mitigation bypass in the Bookmarks & History component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:26 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100826 (GCVE-0-2026-100826)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:21
VLAI
EPSS
VEX
Title
Denial-of-service in the Storage: StorageManager component
Summary
Denial-of-service in the Storage: StorageManager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 13:37 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100825 (GCVE-0-2026-100825)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:21
VLAI
EPSS
VEX
Title
Use-after-free in the JavaScript Engine: JIT component
Summary
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 13:12 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100824 (GCVE-0-2026-100824)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:21
VLAI
EPSS
VEX
Title
Privilege escalation in the Places component
Summary
Privilege escalation in the Places component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 00:00 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100823 (GCVE-0-2026-100823)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 10:50
VLAI
EPSS
VEX
Title
Spoofing issue in the Downloads component in Firefox for Android
Summary
Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:46 UTC
CWE
- CWE-451 - User Interface (UI) Misrepresentation of Critical Information
Assigner
References
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CVE-2026-100822 (GCVE-0-2026-100822)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 20:11
VLAI
EPSS
VEX
Title
Spoofing issue in the Networking: HTTP component
Summary
Spoofing issue in the Networking: HTTP component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:46 UTC
CWE
- CWE-451 - User Interface (UI) Misrepresentation of Critical Information
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100821 (GCVE-0-2026-100821)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:55
VLAI
EPSS
VEX
Title
Site isolation issue in the Panning and Zooming component
Summary
Site isolation issue in the Panning and Zooming component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:55 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.42 , ≤ 115.*
(rpm)
Unaffected: 140.17 , ≤ 140.* (rpm) Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100820 (GCVE-0-2026-100820)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:20
VLAI
EPSS
VEX
Title
Privilege escalation in the Address Bar component
Summary
Privilege escalation in the Address Bar component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 00:00 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Firefox |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100819 (GCVE-0-2026-100819)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:20
VLAI
EPSS
VEX
Title
Sandbox escape due to incorrect boundary conditions in the XPCOM component
Summary
Sandbox escape due to incorrect boundary conditions in the XPCOM component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 00:00 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.42 , ≤ 115.*
(rpm)
Unaffected: 140.17 , ≤ 140.* (rpm) Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100818 (GCVE-0-2026-100818)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:20
VLAI
EPSS
VEX
Title
Sandbox escape due to use-after-free in the Widget: Gtk component
Summary
Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 13:13 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Firefox |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100817 (GCVE-0-2026-100817)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:51
VLAI
EPSS
VEX
Title
Other issue in the JavaScript: WebAssembly component
Summary
Other issue in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:36 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
157 , ≤ *
(rpm)
|
|
| Mozilla | Firefox |
Unaffected:
157 , ≤ *
(rpm)
|
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CVE-2026-100816 (GCVE-0-2026-100816)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:38
VLAI
EPSS
VEX
Title
Site isolation issue in the DOM: Networking component
Summary
Site isolation issue in the DOM: Networking component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:38 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100815 (GCVE-0-2026-100815)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:21
VLAI
EPSS
VEX
Title
Use-after-free in the CSS Parsing and Computation component
Summary
Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 00:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100814 (GCVE-0-2026-100814)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:21
VLAI
EPSS
VEX
Title
Incorrect boundary conditions in the JavaScript Engine: JIT component
Summary
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 14:25 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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},
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CVE-2026-100813 (GCVE-0-2026-100813)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:15
VLAI
EPSS
VEX
Title
Invalid pointer in the JavaScript Engine: JIT component
Summary
Invalid pointer in the JavaScript Engine: JIT component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 14:25 UTC
CWE
- CWE-763 - Release of Invalid Pointer or Reference
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
157 , ≤ *
(rpm)
|
|
| Mozilla | Firefox |
Unaffected:
157 , ≤ *
(rpm)
|
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CVE-2026-100812 (GCVE-0-2026-100812)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:21
VLAI
EPSS
VEX
Title
Denial-of-service in the Graphics component
Summary
Denial-of-service in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 14:08 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100811 (GCVE-0-2026-100811)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:20
VLAI
EPSS
VEX
Title
Sandbox escape due to use-after-free in the DOM: Core & HTML component
Summary
Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 00:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Firefox |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100810 (GCVE-0-2026-100810)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:35
VLAI
EPSS
VEX
Title
Other issue in the DevTools component
Summary
Other issue in the DevTools component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:35 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
157 , ≤ *
(rpm)
|
|
| Mozilla | Firefox |
Unaffected:
157 , ≤ *
(rpm)
|
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CVE-2026-100809 (GCVE-0-2026-100809)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:31
VLAI
EPSS
VEX
Title
Same-origin policy bypass in the DevTools component
Summary
Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:30 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100808 (GCVE-0-2026-100808)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:22
VLAI
EPSS
VEX
Title
Mitigation bypass in the DOM: Service Workers component
Summary
Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:22 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100807 (GCVE-0-2026-100807)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:20
VLAI
EPSS
VEX
Title
Privilege escalation in the DOM: Service Workers component
Summary
Privilege escalation in the DOM: Service Workers component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 00:00 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Firefox |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100806 (GCVE-0-2026-100806)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:20
VLAI
EPSS
VEX
Title
Uninitialized memory in the Graphics: WebGPU component
Summary
Uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 16:24 UTC
CWE
- CWE-457 - Use of Uninitialized Variable
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.4 , ≤ 153.*
(rpm)
Unaffected: 157 , ≤ * (rpm) |
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CVE-2026-100805 (GCVE-0-2026-100805)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:14
VLAI
EPSS
VEX
Title
Race condition, use-after-free in the Audio/Video component
Summary
Race condition, use-after-free in the Audio/Video component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 00:00 UTC
CWE
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
157 , ≤ *
(rpm)
|
|
| Mozilla | Firefox |
Unaffected:
157 , ≤ *
(rpm)
|
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CVE-2026-100804 (GCVE-0-2026-100804)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:14
VLAI
EPSS
VEX
Title
Sandbox escape due to use-after-free in the Preferences: Backend component
Summary
Sandbox escape due to use-after-free in the Preferences: Backend component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 00:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
157 , ≤ *
(rpm)
|
|
| Mozilla | Firefox |
Unaffected:
157 , ≤ *
(rpm)
|
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CVE-2026-100803 (GCVE-0-2026-100803)
Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-01 15:16
VLAI
EPSS
VEX
Title
Same-origin policy bypass in the WebExtensions component
Summary
Same-origin policy bypass in the WebExtensions component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:15 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.42 , ≤ 115.*
(rpm)
Unaffected: 140.17 , ≤ 140.* (rpm) Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.17 , ≤ 140.*
(rpm)
Unaffected: 153.4 , ≤ 153.* (rpm) Unaffected: 157 , ≤ * (rpm) |
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