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.
432 vulnerabilities reference this CWE, most recent first.
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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CVE-2026-87822 (GCVE-0-2026-87822)
Vulnerability from cvelistv5 – Published: 2026-09-09 14:32 – Updated: 2026-09-10 14:57
VLAI
EPSS
VEX
Title
t-digest 3.1 through 3.3 Denial of Service via NaN Centroid Means in MergingDigest.fromBytes
Summary
t-digest versions 3.1 through 3.3 fail to validate centroid means during deserialization in MergingDigest.fromBytes, allowing attackers to inject NaN values that bypass validation checks. Attackers can craft malicious serialized digests containing NaN centroids that degrade sorting performance from O(n log n) to O(n squared), causing severe processing delays during merge operations.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 14:22 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/tdunning/t-digest/issues/229 | issue-tracking |
| https://github.com/tdunning/t-digest/blob/8d5c152… | technical-description |
| https://github.com/tdunning/t-digest/blob/8d5c152… | technical-description |
| https://github.com/tdunning/t-digest | product |
| https://www.vulncheck.com/advisories/t-digest-3.1… | third-party-advisory |
Date Public
2026-08-24 00:00
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CVE-2026-87721 (GCVE-0-2026-87721)
Vulnerability from cvelistv5 – Published: 2026-09-24 22:02 – Updated: 2026-09-25 16:49
VLAI
EPSS
VEX
Title
Denial of Service via Exponential Backtracking in ANTLR Search Query Parser in Gerrit Code Review
Summary
Uncontrolled Resource Consumption (CWE-400 / CWE-407) in the ANTLR 3 search query parser (QueryParser / Query.g) in Gerrit Code Review versions 2.0.19 through 3.12.9, 3.13.0 through 3.13.8, and 3.14.0 through 3.14.2 allows an unauthenticated remote attacker (or an authenticated user if anonymous read access is disabled) to cause a persistent denial of service (CPU exhaustion and HTTP worker thread pool starvation requiring a server restart) via crafted search queries containing deeply nested parentheses sent to query evaluation endpoints (/changes/?q=, /accounts/?q=, /groups/?query=, /projects/?query=, /Documentation/?q=, /changes/{id}/query?expression=, or SSH gerrit query). Because syntactic predicates in conditionOr and conditionAnd recurse via conditionBase without memoization prior to capability or visibility checks and worker threads do not abort when the client disconnects, a small number of requests (such as 25 requests matching default httpd.maxThreads) can permanently pin all HTTP worker threads. This issue is fixed in Gerrit Code Review versions 3.12.10, 3.13.9, and 3.14.3.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 16:45 UTC
CWE
Assigner
References
1 reference
Impacted products
Date Public
2026-09-22 00:00
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CVE-2026-87081 (GCVE-0-2026-87081)
Vulnerability from cvelistv5 – Published: 2026-09-22 07:25 – Updated: 2026-09-22 17:07
VLAI
EPSS
VEX
Title
Net::IDN::UTS46 versions before 2.590 for Perl allow CPU exhaustion via quadratic punycode encoding of an overlong label before the length check in to_ascii
Summary
Net::IDN::UTS46 versions before 2.590 for Perl allow CPU exhaustion via quadratic punycode encoding of an overlong label before the length check in to_ascii.
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Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 15:18 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
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CVE-2026-87079 (GCVE-0-2026-87079)
Vulnerability from cvelistv5 – Published: 2026-09-22 07:24 – Updated: 2026-09-22 17:07
VLAI
EPSS
VEX
Title
Net::IDN::Punycode versions before 2.590 for Perl allow CPU exhaustion via quadratic insertion cost when decoding a long label in decode_punycode
Summary
Net::IDN::Punycode versions before 2.590 for Perl allow CPU exhaustion via quadratic insertion cost when decoding a long label in decode_punycode.
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Nothing bounds the label length in the to-Unicode direction. The 63-byte DNS limit is checked only when converting to ASCII, so domain_to_unicode and uts46_to_unicode pass an attacker-supplied label of any length to the decoder.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 12:29 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
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CVE-2026-86435 (GCVE-0-2026-86435)
Vulnerability from cvelistv5 – Published: 2026-09-07 12:53 – Updated: 2026-10-08 15:25
VLAI
EPSS
VEX
Title
commonmark 1.5.0 before 2.8.4 Denial of Service via Footnote
Summary
commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Footnote extension that fails to deduplicate footnote definitions. Attackers can craft documents with duplicate footnote definitions and references to create quadratic output expansion, consuming excessive memory and CPU to exhaust server resources.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 14:31 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/thephpleague/commonmark/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/commonmark-1… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| thephpleague | commonmark |
Affected:
1.5.0 , < 2.8.4
(semver)
Unaffected: 2.8.4 (semver) cpe:2.3:a:thephpleague:commonmark:*:*:*:*:*:*:*:* |
Date Public
2026-08-03 00:00
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CVE-2026-86434 (GCVE-0-2026-86434)
Vulnerability from cvelistv5 – Published: 2026-09-07 12:53 – Updated: 2026-10-08 15:25
VLAI
EPSS
VEX
Title
commonmark 2.0.0 through 2.8.3 Denial of Service via Slug Collision
Summary
league/commonmark versions >= 2.0.0 and < 2.8.4 (patched in 2.9.0) contain a denial of service vulnerability in UniqueSlugNormalizer::normalize(), which restarts its numeric-suffix search from 1 on every slug collision, resulting in O(K^2) time complexity for K headings that collapse to the same base slug. The vulnerable path is reached when HeadingPermalinkExtension, FootnoteExtension, or TableOfContentsExtension is registered. An unauthenticated attacker can force many headings onto a single base slug (e.g., via empty ATX headings, identical heading text, or punctuation-only headings) in a small Markdown document, consuming excessive CPU and denying service.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 17:42 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/thephpleague/commonmark/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/commonmark-2… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| thephpleague | commonmark |
Affected:
2.0.0 , < 2.8.4
(semver)
Unaffected: 2.8.4 (semver) cpe:2.3:a:thephpleague:commonmark:*:*:*:*:*:*:*:* |
Date Public
2026-08-03 00:00
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CVE-2026-86433 (GCVE-0-2026-86433)
Vulnerability from cvelistv5 – Published: 2026-09-07 12:53 – Updated: 2026-10-08 15:25
VLAI
EPSS
VEX
Title
commonmark 1.5.0 before 2.8.4 Denial of Service via Attributes
Summary
commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Attributes extension where AttributesListener::findTargetAndDirection() performs quadratic-time sibling list scanning. Unauthenticated attackers can submit approximately 32 KB of repeated attribute blocks to cause parsing to take over 5 seconds, exhausting server resources.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 12:50 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/thephpleague/commonmark/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/commonmark-1… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| thephpleague | commonmark |
Affected:
1.5.0 , < 2.8.4
(semver)
Unaffected: 2.8.4 (semver) cpe:2.3:a:thephpleague:commonmark:*:*:*:*:*:*:*:* |
Date Public
2026-08-03 00:00
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.