Common Weakness Enumeration

CWE-1333

Allowed

Inefficient Regular Expression Complexity

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

792 vulnerabilities reference this CWE, most recent first.

CVE-2025-25285 (GCVE-0-2025-25285)

Vulnerability from cvelistv5 – Published: 2025-02-14 19:31 – Updated: 2025-02-14 19:44
VLAI
Title
@octokit/endpoint has a Regular Expression in parse that Leads to ReDoS Vulnerability Due to Catastrophic Backtracking
Summary
@octokit/endpoint turns REST API endpoints into generic request options. Starting in version 4.1.0 and prior to version 10.1.3, by crafting specific `options` parameters, the `endpoint.parse(options)` call can be triggered, leading to a regular expression denial-of-service (ReDoS) attack. This causes the program to hang and results in high CPU utilization. The issue occurs in the `parse` function within the `parse.ts` file of the npm package `@octokit/endpoint`. Version 10.1.3 contains a patch for the issue.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-14 19:42 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
Vendor Product Version
octokit endpoint.js Affected: >= 4.1.0, < 10.1.3
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CVE-2025-25283 (GCVE-0-2025-25283)

Vulnerability from cvelistv5 – Published: 2025-02-12 18:21 – Updated: 2025-02-12 19:25
VLAI
Title
parse-duraton vulnerable to Regex Denial of Service that results in event loop delay and out of memory
Summary
parse-duraton is software that allows users to convert a human readable duration to milliseconds. Versions prior to 2.1.3 are vulnerable to an event loop delay due to the CPU-bound operation of resolving the provided string, from a 0.5ms and up to ~50ms per one operation, with a varying size from 0.01 MB and up to 4.3 MB respectively, and an out of memory that would crash a running Node.js application due to a string size of roughly 10 MB that utilizes unicode characters. Version 2.1.3 contains a patch.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-12 19:25 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
Vendor Product Version
jkroso parse-duration Affected: < 2.1.3
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CVE-2025-25200 (GCVE-0-2025-25200)

Vulnerability from cvelistv5 – Published: 2025-02-12 17:59 – Updated: 2025-02-12 19:29
VLAI
Title
Koa has Inefficient Regular Expression Complexity
Summary
Koa is expressive middleware for Node.js using ES2017 async functions. Prior to versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3, Koa uses an evil regex to parse the `X-Forwarded-Proto` and `X-Forwarded-Host` HTTP headers. This can be exploited to carry out a Denial-of-Service attack. Versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3 fix the issue.
Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-12 18:33 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
Vendor Product Version
koajs koa Affected: < 0.21.2
Affected: >= 1.0.0, < 1.7.1
Affected: >= 2.0.0-alpha.1, < 2.15.4
Affected: >= 3.0.0-alpha.0, < < 3.0.0-alpha.3
Create a notification for this product.
Show details on NVD website
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CVE-2025-24026 (GCVE-0-2025-24026)

Vulnerability from cvelistv5 – Published: 2025-05-14 14:59 – Updated: 2025-05-14 15:10
VLAI
Title
iTop Inefficient Regular Expression Complexity vulnerability
Summary
iTop is an web based IT Service Management tool. Versions prior to 3.2.1 are vulnerable to regular expression denial of service (ReDoS) that may, under some circumstances, affect iTop server. Version 3.2.1 doesn't use the affected variable in the regular expression. As a workaround, if iTop app_root_url is defined in the configuration file, then there is no possible way to exploit this ReDoS.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-14 15:10 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
Vendor Product Version
Combodo iTop Affected: < 3.2.1
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CVE-2025-10990 (GCVE-0-2025-10990)

Vulnerability from cvelistv5 – Published: 2026-02-27 13:32 – Updated: 2026-06-25 23:53
VLAI
Title
Rexml: rexml: denial of service via inefficient regex parsing
Summary
A flaw was found in REXML. A remote attacker could exploit inefficient regular expression (regex) parsing when processing hex numeric character references (&#x...;) in XML documents. This could lead to a Regular Expression Denial of Service (ReDoS), impacting the availability of the affected component. This issue is the result of an incomplete fix for CVE-2024-49761.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-27 18:43 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
Vendor Product Version
Unaffected: 6.17.5
Unaffected: 6.16.5.4
Red Hat Red Hat Satellite 6.16 for RHEL 8 Unaffected: 0:8.8.1-3.el8sat , < * (rpm)
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    cpe:/a:redhat:satellite_utils:6.16::el8
    cpe:/a:redhat:satellite_utils:6.16::el9
Create a notification for this product.
Red Hat Red Hat Satellite 6.16 for RHEL 9 Unaffected: 0:8.8.1-3.el9sat , < * (rpm)
    cpe:/a:redhat:satellite:6.16::el8
    cpe:/a:redhat:satellite:6.16::el9
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    cpe:/a:redhat:satellite_utils:6.16::el8
    cpe:/a:redhat:satellite_utils:6.16::el9
Create a notification for this product.
Red Hat Red Hat Satellite 6.17 for RHEL 9 Unaffected: 0:8.8.1-3.el9sat , < * (rpm)
    cpe:/a:redhat:satellite:6.17::el9
    cpe:/a:redhat:satellite_capsule:6.17::el9
    cpe:/a:redhat:satellite_utils:6.17::el9
Create a notification for this product.
Red Hat Satellite Client 6 for RHEL 8 Unaffected: 0:7.34.0-4.el8sat , < * (rpm)
    cpe:/a:redhat:rhel_satellite_client:6::el8
    cpe:/a:redhat:rhel_satellite_client:6::el9
Create a notification for this product.
Red Hat Satellite Client 6 for RHEL 9 Unaffected: 0:7.34.0-4.el9sat , < * (rpm)
    cpe:/a:redhat:rhel_satellite_client:6::el8
    cpe:/a:redhat:rhel_satellite_client:6::el9
Create a notification for this product.
Date Public
2025-09-25 00:00
Show details on NVD website
To clipboard 

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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
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
5.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-29 19:18 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
  • CWE-400 - Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
mixmark-io turndown Affected: 7.2.0
Affected: 7.2.1
Create a notification for this product.
Credits
CrazzyHe (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2025-9308 (GCVE-0-2025-9308)

Vulnerability from cvelistv5 – Published: 2025-08-21 16:02 – Updated: 2025-08-21 17:32 Unsupported When Assigned
VLAI
Title
yarnpkg Yarn request-manager.js setOptions redos
Summary
A vulnerability has been found in yarnpkg Yarn up to 1.22.22. This impacts the function setOptions of the file src/util/request-manager.js. Such manipulation leads to inefficient regular expression complexity. Local access is required to approach this attack. This vulnerability only affects products that are no longer supported by the maintainer.
Severity
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:R
3.3 (Low)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-21 17:24 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
  • CWE-400 - Resource Consumption
Assigner
References
URL Tags
https://vuldb.com/?id.320913 vdb-entrytechnical-description
https://vuldb.com/?ctiid.320913 signaturepermissions-required
https://vuldb.com/?submit.633486 third-party-advisory
https://github.com/yarnpkg/yarn/pull/9203 issue-tracking
Impacted products
Vendor Product Version
yarnpkg Yarn Affected: 1.22.0
Affected: 1.22.1
Affected: 1.22.2
Affected: 1.22.3
Affected: 1.22.4
Affected: 1.22.5
Affected: 1.22.6
Affected: 1.22.7
Affected: 1.22.8
Affected: 1.22.9
Affected: 1.22.10
Affected: 1.22.11
Affected: 1.22.12
Affected: 1.22.13
Affected: 1.22.14
Affected: 1.22.15
Affected: 1.22.16
Affected: 1.22.17
Affected: 1.22.18
Affected: 1.22.19
Affected: 1.22.20
Affected: 1.22.21
Affected: 1.22.22
Create a notification for this product.
Credits
mmmsssttt (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2025-8262 (GCVE-0-2025-8262)

Vulnerability from cvelistv5 – Published: 2025-07-28 07:02 – Updated: 2025-07-28 17:16
VLAI
Title
yarnpkg Yarn hosted-git-resolver.js explodeHostedGitFragment redos
Summary
A vulnerability was found in yarnpkg Yarn up to 1.22.22. It has been classified as problematic. Affected is the function explodeHostedGitFragment of the file src/resolvers/exotics/hosted-git-resolver.js. The manipulation leads to inefficient regular expression complexity. It is possible to launch the attack remotely. The patch is identified as 97731871e674bf93bcbf29e9d3258da8685f3076. It is recommended to apply a patch to fix this issue.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C
4.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-28 17:13 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
  • CWE-400 - Resource Consumption
Assigner
References
URL Tags
https://vuldb.com/?id.317850 vdb-entrytechnical-description
https://vuldb.com/?ctiid.317850 signaturepermissions-required
https://vuldb.com/?submit.617393 third-party-advisory
https://github.com/yarnpkg/yarn/pull/9199 issue-tracking
https://github.com/yarnpkg/yarn/pull/9199/commits… issue-trackingpatch
Impacted products
Vendor Product Version
yarnpkg Yarn Affected: 1.22.0
Affected: 1.22.1
Affected: 1.22.2
Affected: 1.22.3
Affected: 1.22.4
Affected: 1.22.5
Affected: 1.22.6
Affected: 1.22.7
Affected: 1.22.8
Affected: 1.22.9
Affected: 1.22.10
Affected: 1.22.11
Affected: 1.22.12
Affected: 1.22.13
Affected: 1.22.14
Affected: 1.22.15
Affected: 1.22.16
Affected: 1.22.17
Affected: 1.22.18
Affected: 1.22.19
Affected: 1.22.20
Affected: 1.22.21
Affected: 1.22.22
Create a notification for this product.
Credits
mmmsssttt (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2025-7579 (GCVE-0-2025-7579)

Vulnerability from cvelistv5 – Published: 2025-07-14 06:14 – Updated: 2025-07-14 13:08
VLAI
Title
chinese-poetry server.js redos
Summary
A vulnerability was found in chinese-poetry 0.1. It has been rated as problematic. This issue affects some unknown processing of the file rank/server.js. The manipulation leads to inefficient regular expression complexity. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
4.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-14 13:05 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
  • CWE-400 - Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
n/a chinese-poetry Affected: 0.1
Credits
DayShift (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2025-7074 (GCVE-0-2025-7074)

Vulnerability from cvelistv5 – Published: 2025-07-05 09:02 – Updated: 2025-07-07 16:06
VLAI
Title
vercel hyper rimraf-standalone.js ignoreMap redos
Summary
A vulnerability classified as problematic has been found in vercel hyper up to 3.4.1. This affects the function expand/braceExpand/ignoreMap of the file hyper/bin/rimraf-standalone.js. The manipulation leads to inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
4.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-07 16:06 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
  • CWE-400 - Resource Consumption
Assigner
References
URL Tags
https://vuldb.com/?id.314973 vdb-entrytechnical-description
https://vuldb.com/?ctiid.314973 signaturepermissions-required
https://vuldb.com/?submit.602353 third-party-advisory
https://github.com/vercel/hyper/issues/8098 exploitissue-tracking
Impacted products
Vendor Product Version
vercel hyper Affected: 3.4.0
Affected: 3.4.1
Create a notification for this product.
Credits
DayShift (VulDB User)
Show details on NVD website
To clipboard 

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Mitigation
Architecture and Design

Use regular expressions that do not support backtracking, e.g. by removing nested quantifiers.

Mitigation
System Configuration

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
Implementation

Do not use regular expressions with untrusted input. If regular expressions must be used, avoid using backtracking in the expression.

Mitigation
Implementation

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.

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