Common Weakness Enumeration
CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2267 vulnerabilities reference this CWE, most recent first.
CVE-2026-8992 (GCVE-0-2026-8992)
Vulnerability from cvelistv5 – Published: 2026-05-22 14:24 – Updated: 2026-05-23 03:55
VLAI
EPSS
VEX
Summary
An improper certificate validation vulnerability in Ivanti Secure Access Client before 22.8R6 allows a remote unauthenticated attacker to execute arbitrary code.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-22 00:00 UTC
CWE
- CWE-295 - Improper certificate validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ivanti | Secure Access Client |
Unaffected:
22.8R6
|
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CVE-2026-8763 (GCVE-0-2026-8763)
Vulnerability from cvelistv5 – Published: 2026-08-03 00:36 – Updated: 2026-10-05 01:16
VLAI
EPSS
VEX
Title
Name Constraints bypass via trailing dot in rfc822Name and URI
Summary
In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 13:29 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/bcgit/bc-java/wiki/CVE%E2%80%9… | vendor-advisory |
| https://github.com/bcgit/bc-java/commit/2c28b253a… | patch |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA |
Affected:
0 , < 1.85
(maven)
|
|
| Legion of the Bouncy Castle Inc. | BC-LTS-JAVA |
Affected:
2.73.0 , < 2.73.12
(maven)
|
|
| Legion of the Bouncy Castle Inc. | BC-FJA |
Affected:
1.0.0 , < 1.0.2.7
(maven)
Affected: 2.0.0 , < 2.0.2 (maven) Affected: 2.1.0 , < 2.1.3 (maven) |
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CVE-2026-8497 (GCVE-0-2026-8497)
Vulnerability from cvelistv5 – Published: 2026-07-29 17:24 – Updated: 2026-07-29 18:14
VLAI
EPSS
VEX
Summary
Improper certificate validation in the Devolutions Server connection handling in Devolutions Password Manager 2026.2.1.0 and earlier on Android, iOS, and macOS allows an adjacent-network attacker to intercept and modify sensitive information via a forged TLS certificate.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-29 18:13 UTC
CWE
- CWE-295 - Improper certificate validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Devolutions | Password Manager |
Affected:
0 , < 2026.2.2
(custom)
|
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CVE-2026-8480 (GCVE-0-2026-8480)
Vulnerability from cvelistv5 – Published: 2026-07-01 14:52 – Updated: 2026-07-01 15:45
VLAI
EPSS
VEX
Title
Connection possible to the Administration portal with a revoked certificate
Summary
A vulnerability was discovered on Stormshield Network Security 4.3.0 to 4.3.41 (included), 4.4.0 to 4.8.15 (included) , 5.0.2 EA to 5.0.5 (included)
A revoked client certificate can still be used to authenticate to the captive‑admin portal, allowing an attacker who possesses the revoked certificate to gain administrative access.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 15:44 UTC
CWE
- CWE-295 - Improper certificate validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Stormshield | Stormshield Network Security |
Affected:
4.3.0 , ≤ 4.3.41
(semver)
Affected: 4.4.0 , ≤ 4.8.15 (semver) Affected: 5.0.2 EA , ≤ 5.0.5 (semver) |
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CVE-2026-8367 (GCVE-0-2026-8367)
Vulnerability from cvelistv5 – Published: 2026-05-13 14:55 – Updated: 2026-05-13 18:35
VLAI
EPSS
VEX
Title
aria2c Improper Certificate Validation
Summary
aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 18:34 UTC
CWE
- CWE-295 - Improper certificate validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| aria2_project | aria2c |
Affected:
0 , ≤ 1.37.0
(semver)
|
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CVE-2026-8286 (GCVE-0-2026-8286)
Vulnerability from cvelistv5 – Published: 2026-07-03 06:14 – Updated: 2026-09-15 06:03
VLAI
EPSS
VEX
Title
wrong STARTTLS connection reuse
Summary
A vulnerability exists where a new transfer that uses STARTTLS to upgrade the
connection might reuse an existing live connection even though the TLS
configuration mismatches so it should not.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 17:33 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| curl | curl |
Affected:
7.30.0 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.20.1 (semver) |
|
| curl | curl |
Affected:
a1701eea289fe7ea80651f801cf992838a491dde , < a86efdd7ca5433de9231e650f18247de8319ad16
(git)
|
|
| curl | curl |
Affected:
8.20.0
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CVE-2026-7821 (GCVE-0-2026-7821)
Vulnerability from cvelistv5 – Published: 2026-05-07 15:26 – Updated: 2026-05-07 16:15
VLAI
EPSS
VEX
Summary
Improper certificate validation in Ivanti EPMM before versions 12.6.1.1, 12.7.0.1, and 12.8.0.1 allows a remote unauthenticated attacker to enroll a device belonging to a restricted set of unenrolled devices, leading to information disclosure about EPMM appliance and impacting on the integrity of the newly enrolled device identity.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-07 16:15 UTC
CWE
- CWE-295 - Improper certificate validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ivanti | Endpoint Manager Mobile |
Unaffected:
12.6.1.1
Unaffected: 12.7.0.1 Unaffected: 12.8.0.1 |
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CVE-2026-7532 (GCVE-0-2026-7532)
Vulnerability from cvelistv5 – Published: 2026-06-25 21:31 – Updated: 2026-07-01 16:47
VLAI
EPSS
VEX
Title
iPAddress name constraints not enforced when WOLFSSL_IP_ALT_NAME is undefined
Summary
iPAddress name constraints bypass when WOLFSSL_IP_ALT_NAME is not defined. IP address name constraints are not enforced in that configuration, allowing a certificate to bypass an issuing CA's IP address constraints.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 10:36 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
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CVE-2026-6900 (GCVE-0-2026-6900)
Vulnerability from cvelistv5 – Published: 2026-07-06 09:53 – Updated: 2026-07-06 18:49
VLAI
EPSS
VEX
Title
Improper Certificate Validation
Summary
Improper certificate validation vulnerability in B&R Industrial Automation GmbH APROL.
This issue affects APROL: before R 4.4-01P5.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 18:49 UTC
CWE
- CWE-295 - Improper certificate validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| B&R Industrial Automation GmbH | APROL |
Affected:
0 , < R 4.4-01P5
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CVE-2026-6731 (GCVE-0-2026-6731)
Vulnerability from cvelistv5 – Published: 2026-06-25 20:08 – Updated: 2026-06-26 13:16
VLAI
EPSS
VEX
Title
X.509 name constraint bypass via Subject CN treated as a DNS name
Summary
X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 13:14 UTC
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
2 references
Impacted products
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Mitigation
Architecture and Design
Implementation
Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
Mitigation
Implementation
If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
CAPEC-459: Creating a Rogue Certification Authority Certificate
An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.
CAPEC-475: Signature Spoofing by Improper Validation
An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.