Common Weakness Enumeration
CWE-407
Allowed-with-ReviewInefficient Algorithmic Complexity
Abstraction: Class · Status: Incomplete
An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.
356 vulnerabilities reference this CWE, most recent first.
CVE-2026-104182 (GCVE-0-2026-104182)
Vulnerability from cvelistv5 – Published: 2026-10-01 20:15 – Updated: 2026-10-01 20:15
VLAI
EPSS
VEX
Title
stream-json: JSONC parser and verifier re-scan the whole accumulated comment on every input chunk
Summary
stream-json is a micro-library of stream components for processing JSON and JSONC with a minimal memory footprint. Prior to 3.6.0, the JSONC parser at stream-json/jsonc/parser.js and verifier at stream-json/jsonc/verifier.js restart comment-terminator scanning from the opening slash whenever a block or line comment spans an input chunk, while retaining the accumulated comment buffer. Delivering a large valid comment across many small chunks therefore causes quadratic CPU work and can stall the Node.js event loop. The maintainer characterizes the attack vector as local because the documented JSONC input is locally owned or user-controlled configuration, rather than input intended for the open internet. This JSONC-only scope does not include the plain JSON parser, which advances through and discards consumed string and number data. This issue is fixed in version 3.6.0.
Severity
6.2 (Medium)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/uhop/stream-json/security/advi… | x_refsource_CONFIRM |
| https://github.com/uhop/stream-json/commit/c0299d… | x_refsource_MISC |
| https://github.com/uhop/stream-json/releases/tag/3.6.0 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| uhop | stream-json |
Affected:
< 3.6.0
|
{
"containers": {
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"affected": [
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"vendor": "uhop",
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],
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}
],
"metrics": [
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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],
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CVE-2026-102999 (GCVE-0-2026-102999)
Vulnerability from cvelistv5 – Published: 2026-09-30 20:10 – Updated: 2026-10-01 18:51
VLAI
EPSS
VEX
Title
pypdf: Possible long runtimes with large amount of embedded files
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/_doc_common.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when an application accesses the embedded-file mapping. This issue is fixed in version 6.19.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 18:51 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/4081 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/6b10556d13… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.19.0 | x_refsource_MISC |
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"vendor": "py-pdf",
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}
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"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
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CVE-2026-102997 (GCVE-0-2026-102997)
Vulnerability from cvelistv5 – Published: 2026-09-30 20:05 – Updated: 2026-09-30 20:05
VLAI
EPSS
VEX
Title
pypdf: Possible long runtimes for partially malformed FlateDecode streams (Follow-up)
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF containing a partially malformed /FlateDecode stream with padded data can force pypdf/filters.py to use inefficient byte-by-byte decompression while the earlier recovery counter fails to advance for bytes that successfully decode, causing long runtimes and application unavailability. This is a residual issue after the malformed FlateDecode recovery fix. This issue is fixed in version 6.18.1.
Severity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/4073 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/d9d38cf99b… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.18.1 | x_refsource_MISC |
{
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"product": "pypdf",
"vendor": "py-pdf",
"versions": [
{
"status": "affected",
"version": "\u003c 6.18.1"
}
]
}
],
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}
],
"metrics": [
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"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
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"privilegesRequired": "NONE",
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"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
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CVE-2026-102994 (GCVE-0-2026-102994)
Vulnerability from cvelistv5 – Published: 2026-09-30 19:57 – Updated: 2026-09-30 20:50
VLAI
EPSS
VEX
Title
pypdf: Possible long runtimes/large memory usage when parsing indirect objects
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that continue for a long time without whitespace can cause pypdf/_reader.py and pypdf/generic/_base.py to scan excessive input through read_until_whitespace, resulting in long runtimes and application unavailability. This issue is fixed in version 6.18.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 20:50 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/4055 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/82501d2993… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.18.0 | x_refsource_MISC |
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CVE-2026-102277 (GCVE-0-2026-102277)
Vulnerability from cvelistv5 – Published: 2026-09-28 20:54 – Updated: 2026-09-29 19:38
VLAI
EPSS
VEX
Title
brace-expansion: Quadratic-time expansion of the `{a},b}` rewrite causes CPU denial of service
Summary
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.21, 2.1.7, 3.0.9, and 5.0.12, the expand function handles untrusted {a},b}-shaped patterns with many trailing closing braces by restarting its scan once for each trailing closing brace. The successive full-input rescans with linear working-string growth cause quadratic CPU time and memory pressure that can block the Node.js event loop. The process eventually recovers, making the impact a recoverable CPU denial of service. This issue is fixed in versions 1.1.21, 2.1.7, 3.0.9, and 5.0.12.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 19:38 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/juliangruber/brace-expansion/s… | x_refsource_CONFIRM |
| https://github.com/juliangruber/brace-expansion/c… | x_refsource_MISC |
| https://github.com/juliangruber/brace-expansion/c… | x_refsource_MISC |
| https://github.com/juliangruber/brace-expansion/c… | x_refsource_MISC |
| https://github.com/juliangruber/brace-expansion/c… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| juliangruber | brace-expansion |
Affected:
>= 4.0.0, < 5.0.12
Affected: >= 3.0.0, < 3.0.9 Affected: >= 2.0.0, < 2.1.7 Affected: < 1.1.21 |
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CVE-2026-100700 (GCVE-0-2026-100700)
Vulnerability from cvelistv5 – Published: 2026-09-26 13:23 – Updated: 2026-09-28 15:01
VLAI
EPSS
VEX
Title
nodemailer before 10.0.6 Denial of Service via addressparser
Summary
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Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 15:00 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/nodemailer/nodemailer/security… | vendor-advisory |
| https://www.vulncheck.com/advisories/nodemailer-b… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| nodemailer | nodemailer |
Affected:
0 , < 10.0.6
(semver)
Unaffected: 10.0.6 (semver) cpe:2.3:a:nodemailer:nodemailer:*:*:*:*:*:*:*:* |
Date Public
2026-09-11 00:00
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CVE-2026-92987 (GCVE-0-2026-92987)
Vulnerability from cvelistv5 – Published: 2026-09-17 14:22 – Updated: 2026-09-24 14:22
VLAI
EPSS
VEX
Title
roxmltree through 0.21.1 Denial of Service via Quadratic Parsing
Summary
roxmltree through 0.21.1 performs quadratic-time attribute and namespace validation during XML parsing without limits on attribute count. Attackers can craft XML documents with tens of thousands of attributes on a single element to consume excessive CPU time and cause denial of service.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 15:32 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/RazrFalcon/roxmltree/issues/153 | issue-tracking |
| https://github.com/RazrFalcon/roxmltree | product |
| https://github.com/RazrFalcon/roxmltree/blob/v0.2… | technical-description |
| https://github.com/RazrFalcon/roxmltree/blob/v0.2… | technical-description |
| https://www.vulncheck.com/advisories/roxmltree-th… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RazrFalcon | roxmltree |
Affected:
0 , ≤ 0.21.1
(semver)
|
Date Public
2026-09-14 00:00
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CVE-2026-92365 (GCVE-0-2026-92365)
Vulnerability from cvelistv5 – Published: 2026-09-16 14:00 – Updated: 2026-09-22 15:45
VLAI
EPSS
VEX
Title
vllm-project vllm thinking_budget_state.py algorithmic complexity
Summary
A vulnerability was found in vllm-project vllm up to 0.29.0. Affected by this issue is some unknown functionality of the file vllm/v1/sample/thinking_budget_state.py. The manipulation results in inefficient algorithmic complexity. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 15:06 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/405451 | vdb-entry |
| https://vuldb.com/vuln/405451/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-92365 | third-party-advisory |
| https://vuldb.com/submit/935016 | third-party-advisory |
| https://github.com/vllm-project/vllm/pull/51133 | issue-trackingpatch |
| https://github.com/vllm-project/vllm/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| vllm-project | vllm |
Affected:
0.1
Affected: 0.2 Affected: 0.3 Affected: 0.4 Affected: 0.5 Affected: 0.6 Affected: 0.7 Affected: 0.8 Affected: 0.9 Affected: 0.10 Affected: 0.11 Affected: 0.12 Affected: 0.13 Affected: 0.14 Affected: 0.15 Affected: 0.16 Affected: 0.17 Affected: 0.18 Affected: 0.19 Affected: 0.20 Affected: 0.21 Affected: 0.22 Affected: 0.23 Affected: 0.24 Affected: 0.25 Affected: 0.26 Affected: 0.27 Affected: 0.28 Affected: 0.29.0 cpe:2.3:a:vllm-project:vllm:*:*:*:*:*:*:*:* |
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CVE-2026-92091 (GCVE-0-2026-92091)
Vulnerability from cvelistv5 – Published: 2026-09-16 07:34 – Updated: 2026-09-16 14:55
VLAI
EPSS
VEX
Title
Jwcrypto: jwcrypto: denial of service via o(n^2) duplicate check on unbounded jwk key_ops array
Summary
A flaw was found in jwcrypto. The JWK.import_key() function validates the key_ops JWK member for duplicate values using an algorithm with O(n^2) time complexity, and the length of key_ops is not bounded. A remote, unauthenticated attacker can supply a JWK with a large key_ops array to an application that passes attacker-controlled key material to a public key-import API (reachable via ECDH-ES key agreement, OIDC dynamic client registration, DPoP, or ACME account key registration, among others) to consume excessive CPU time, resulting in a denial of service.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 14:54 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-92091 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2533849 | issue-trackingx_refsource_REDHAT |
| https://github.com/latchset/jwcrypto/security/adv… |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
|
| Red Hat | Red Hat OpenStack Platform 16.2 |
cpe:/a:redhat:openstack:16.2
|
|
| Red Hat | Red Hat OpenStack Platform 17.1 |
cpe:/a:redhat:openstack:17.1
|
Date Public
2026-09-16 07:04
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CVE-2026-90776 (GCVE-0-2026-90776)
Vulnerability from cvelistv5 – Published: 2026-09-13 11:42 – Updated: 2026-09-24 14:21
VLAI
EPSS
VEX
Title
Nodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address Parsing
Summary
Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 14:04 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/nodemailer/nodemailer/security… | vendor-advisory |
| https://github.com/nodemailer/nodemailer/commit/c… | patch |
| https://github.com/nodemailer/nodemailer/blob/v10… | technical-description |
| https://github.com/nodemailer/nodemailer/releases… | release-notes |
| https://github.com/nodemailer/nodemailer | product |
| https://www.vulncheck.com/advisories/nodemailer-9… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| nodemailer | nodemailer |
Affected:
9.1.0 , < 10.0.5
(semver)
Unaffected: 10.0.5 (semver) cpe:2.3:a:nodemailer:nodemailer:*:*:*:*:*:*:*:* |
Date Public
2026-09-11 00:00
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.