CWE-1333
Inefficient Regular Expression Complexity
The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
CVE-2025-9670 (GCVE-0-2025-9670)
Vulnerability from cvelistv5 – Published: 2025-08-29 19:02 – Updated: 2025-08-29 19:19
VLAI
Title
mixmark-io turndown commonmark-rules.js redos
Summary
A security flaw has been discovered in mixmark-io turndown up to 7.2.1. This affects an unknown function of the file src/commonmark-rules.js. Performing manipulation results in inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been released to the public and may be exploited.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.321880 | vdb-entry |
| https://vuldb.com/?ctiid.321880 | signaturepermissions-required |
| https://vuldb.com/?submit.637911 | third-party-advisory |
| https://github.com/mixmark-io/turndown/issues/501 | issue-tracking |
| https://github.com/mixmark-io/turndown/issues/501… | exploitissue-tracking |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mixmark-io | turndown |
Affected:
7.2.0
Affected: 7.2.1 |
Credits
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CVE-2026-0621 (GCVE-0-2026-0621)
Vulnerability from cvelistv5 – Published: 2026-01-05 20:57 – Updated: 2026-03-05 01:30
VLAI
Title
MCP TypeScript SDK UriTemplate Exploded Array Pattern ReDoS
Summary
Anthropic's MCP TypeScript SDK versions up to and including 1.25.1 contain a regular expression denial of service (ReDoS) vulnerability in the UriTemplate class when processing RFC 6570 exploded array patterns. The dynamically generated regular expression used during URI matching contains nested quantifiers that can trigger catastrophic backtracking on specially crafted inputs, resulting in excessive CPU consumption. An attacker can exploit this by supplying a malicious URI that causes the Node.js process to become unresponsive, leading to a denial of service.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/modelcontextprotocol/typescrip… | issue-tracking |
| https://www.vulncheck.com/advisories/mcp-typescri… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Anthropic | MCP TypeScript SDK |
Affected:
0 , ≤ 1.25.1
(semver)
|
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CVE-2026-0668 (GCVE-0-2026-0668)
Vulnerability from cvelistv5 – Published: 2026-01-07 17:36 – Updated: 2026-01-07 19:17
VLAI
Title
VisualData extension: Regular Expression Denial of Service (ReDoS) via crafted user input
Summary
Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki - VisualData Extension allows Regular Expression Exponential Blowup.This issue affects MediaWiki - VisualData Extension: 1.45.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | MediaWiki - VisualData Extension |
Affected:
1.45
|
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CVE-2026-0967 (GCVE-0-2026-0967)
Vulnerability from cvelistv5 – Published: 2026-03-26 20:06 – Updated: 2026-05-19 13:17
VLAI
Title
Libssh: libssh: denial of service via inefficient regular expression processing
Summary
A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:18160 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:18683 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-0967 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2436981 | issue-trackingx_refsource_REDHAT |
| https://www.libssh.org/2026/02/10/libssh-0-12-0-a… |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:0.12.0-2.el10 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:0.10.4-18.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream cpe:/o:redhat:enterprise_linux:9::baseos |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| 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 Hardened Images |
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
Date Public
2026-02-10 18:47
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CVE-2026-10291 (GCVE-0-2026-10291)
Vulnerability from cvelistv5 – Published: 2026-06-01 20:45 – Updated: 2026-06-02 15:45 X_Open Source
VLAI
Title
Enderfga claw-orchestrator Session Grep Endpoint embedded-server.ts validateRegex redos
Summary
A security vulnerability has been detected in Enderfga claw-orchestrator up to 3.7.0. The impacted element is the function validateRegex of the file claw-orchestrator/src/embedded-server.ts of the component Session Grep Endpoint. The manipulation of the argument body.pattern leads to inefficient regular expression complexity. The attack may be initiated remotely. Upgrading to version 3.7.1 is sufficient to resolve this issue. The identifier of the patch is 3f970a974c65a94555c25af9f2796f11315e4584. It is recommended to upgrade the affected component.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/367584 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/367584/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-10291 | third-party-advisory |
| https://vuldb.com/submit/826222 | third-party-advisory |
| https://github.com/Enderfga/claw-orchestrator/issues/64 | issue-tracking |
| https://github.com/Enderfga/claw-orchestrator/iss… | issue-tracking |
| https://github.com/Enderfga/claw-orchestrator/com… | patch |
| https://github.com/Enderfga/claw-orchestrator/rel… | patch |
| https://github.com/Enderfga/claw-orchestrator/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Enderfga | claw-orchestrator |
Affected:
3.0
Affected: 3.1 Affected: 3.2 Affected: 3.3 Affected: 3.4 Affected: 3.5 Affected: 3.6 Affected: 3.7.0 Unaffected: 3.7.1 cpe:2.3:a:enderfga:claw-orchestrator:*:*:*:*:*:*:*:* |
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CVE-2026-10691 (GCVE-0-2026-10691)
Vulnerability from cvelistv5 – Published: 2026-06-02 23:30 – Updated: 2026-06-03 13:47 X_Open Source
VLAI
Title
wonderwhy-er DesktopCommanderMCP start_search search-manager.ts redos
Summary
A security flaw has been discovered in wonderwhy-er DesktopCommanderMCP up to 0.2.38. This impacts an unknown function of the file src/search-manager.ts of the component start_search. Performing a manipulation of the argument SearchResult[] results in inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 0.2.39 will fix this issue. The patch is named 4ce845f8749b6a159b57b38dcc3357f7222a8078. It is suggested to upgrade the affected component.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/367960 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/367960/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-10691 | third-party-advisory |
| https://vuldb.com/submit/830746 | third-party-advisory |
| https://github.com/wonderwhy-er/DesktopCommanderM… | exploitissue-tracking |
| https://github.com/wonderwhy-er/DesktopCommanderM… | issue-trackingpatch |
| https://github.com/wonderwhy-er/DesktopCommanderM… | patch |
| https://github.com/wonderwhy-er/DesktopCommanderM… | patch |
| https://github.com/wonderwhy-er/DesktopCommanderMCP/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wonderwhy-er | DesktopCommanderMCP |
Affected:
0.2.0
Affected: 0.2.1 Affected: 0.2.2 Affected: 0.2.3 Affected: 0.2.4 Affected: 0.2.5 Affected: 0.2.6 Affected: 0.2.7 Affected: 0.2.8 Affected: 0.2.9 Affected: 0.2.10 Affected: 0.2.11 Affected: 0.2.12 Affected: 0.2.13 Affected: 0.2.14 Affected: 0.2.15 Affected: 0.2.16 Affected: 0.2.17 Affected: 0.2.18 Affected: 0.2.19 Affected: 0.2.20 Affected: 0.2.21 Affected: 0.2.22 Affected: 0.2.23 Affected: 0.2.24 Affected: 0.2.25 Affected: 0.2.26 Affected: 0.2.27 Affected: 0.2.28 Affected: 0.2.29 Affected: 0.2.30 Affected: 0.2.31 Affected: 0.2.32 Affected: 0.2.33 Affected: 0.2.34 Affected: 0.2.35 Affected: 0.2.36 Affected: 0.2.37 Affected: 0.2.38 Unaffected: 0.2.39 cpe:2.3:a:wonderwhy-er:desktopcommandermcp:*:*:*:*:*:*:*:* |
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CVE-2026-10692 (GCVE-0-2026-10692)
Vulnerability from cvelistv5 – Published: 2026-06-02 23:45 – Updated: 2026-06-03 14:10 X_Open Source
VLAI
Title
johnhuang316 code-index-mcp search_code_advanced is_safe_regex_pattern redos
Summary
A weakness has been identified in johnhuang316 code-index-mcp up to 2.14.0. Affected is the function is_safe_regex_pattern of the component search_code_advanced. Executing a manipulation of the argument regex can lead to inefficient regular expression complexity. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 2.14.1 is able to address this issue. This patch is called 25bc02fac74051ddae15ce79e952f00211b1ea6b. Upgrading the affected component is recommended.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/367961 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/367961/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-10692 | third-party-advisory |
| https://vuldb.com/submit/830786 | third-party-advisory |
| https://github.com/johnhuang316/code-index-mcp/is… | exploitissue-tracking |
| https://github.com/johnhuang316/code-index-mcp/co… | patch |
| https://github.com/johnhuang316/code-index-mcp/re… | patch |
| https://github.com/johnhuang316/code-index-mcp/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| johnhuang316 | code-index-mcp |
Affected:
2.0
Affected: 2.1 Affected: 2.2 Affected: 2.3 Affected: 2.4 Affected: 2.5 Affected: 2.6 Affected: 2.7 Affected: 2.8 Affected: 2.9 Affected: 2.10 Affected: 2.11 Affected: 2.12 Affected: 2.13 Affected: 2.14.0 Unaffected: 2.14.1 cpe:2.3:a:johnhuang316:code-index-mcp:*:*:*:*:*:*:*:* |
Credits
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CVE-2026-1388 (GCVE-0-2026-1388)
Vulnerability from cvelistv5 – Published: 2026-02-25 20:05 – Updated: 2026-02-26 15:07
VLAI
Title
Inefficient Regular Expression Complexity in GitLab
Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.2 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an unauthenticated user to cause regular expression denial of service by sending specially crafted input to a merge request endpoint under certain conditions.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://gitlab.com/gitlab-org/gitlab/-/issues/587560 | issue-trackingpermissions-required |
| https://hackerone.com/reports/3482893 | technical-descriptionexploitpermissions-required |
| https://about.gitlab.com/releases/2026/02/25/patc… |
Impacted products
Credits
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CVE-2026-21868 (GCVE-0-2026-21868)
Vulnerability from cvelistv5 – Published: 2026-01-08 00:26 – Updated: 2026-01-08 19:06
VLAI
Title
Flag Forge has ReDoS Vulnerability in User Profile Lookup API
Summary
Flag Forge is a Capture The Flag (CTF) platform. Versions 2.3.2 and below have a Regular Expression Denial of Service (ReDoS) vulnerability in the user profile API endpoint (/api/user/[username]). The application constructs a regular expression dynamically using unescaped user input (the username parameter). An attacker can exploit this by sending a specially crafted username containing regex meta-characters (e.g., deeply nested groups or quantifiers), causing the MongoDB regex engine to consume excessive CPU resources. This can lead to Denial of Service for other users. The issue is fixed in version 2.3.3. To workaround this issue, implement a Web Application Firewall (WAF) rule to block requests containing regex meta-characters in the URL path.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/FlagForgeCTF/flagForge/securit… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FlagForgeCTF | flagForge |
Affected:
< 2.3.3
|
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CVE-2026-22178 (GCVE-0-2026-22178)
Vulnerability from cvelistv5 – Published: 2026-03-18 01:34 – Updated: 2026-03-18 16:07 X_Open Source
VLAI
Title
OpenClaw < 2026.2.19 - ReDoS and Regex Injection via Unescaped Feishu Mention Metadata
Summary
OpenClaw versions prior to 2026.2.19 construct RegExp objects directly from unescaped Feishu mention metadata in the stripBotMention function, allowing regex injection and denial of service. Attackers can craft nested-quantifier patterns or metacharacters in mention metadata to trigger catastrophic backtracking, block message processing, or remove unintended content before model processing.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/openclaw/openclaw/security/adv… | third-party-advisory |
| https://github.com/openclaw/openclaw/commit/7e67a… | patch |
| https://github.com/openclaw/openclaw/commit/74268… | patch |
| https://www.vulncheck.com/advisories/openclaw-red… | third-party-advisory |
Impacted products
Date Public
2026-02-21 00:00
Credits
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Mitigation
Phase: Architecture and Design
Description:
- Use regular expressions that do not support backtracking, e.g. by removing nested quantifiers.
Mitigation
Phase: System Configuration
Description:
- Set backtracking limits in the configuration of the regular expression implementation, such as PHP's pcre.backtrack_limit. Also consider limits on execution time for the process.
Mitigation
Phase: Implementation
Description:
- Do not use regular expressions with untrusted input. If regular expressions must be used, avoid using backtracking in the expression.
Mitigation
Phase: Implementation
Description:
- Limit the length of the input that the regular expression will process.
CAPEC-492: Regular Expression Exponential Blowup
An adversary may execute an attack on a program that uses a poor Regular Expression(Regex) implementation by choosing input that results in an extreme situation for the Regex. A typical extreme situation operates at exponential time compared to the input size. This is due to most implementations using a Nondeterministic Finite Automaton(NFA) state machine to be built by the Regex algorithm since NFA allows backtracking and thus more complex regular expressions.