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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-2026-14895 (GCVE-0-2026-14895)
Vulnerability from cvelistv5 – Published: 2026-07-07 22:12 – Updated: 2026-07-08 14:05
VLAI
EPSS
VEX
Title
String::Util versions before 1.36 for Perl are susceptible to a regular expression denial of service
Summary
String::Util versions before 1.36 for Perl are susceptible to a regular expression denial of service.
The trim and rtrim functions stripped trailing whitespace with s/\s*$//u. Because \s* matches greedily and the $ anchor fails whenever a non-whitespace character follows the whitespace, the regex engine retries the match at each offset of a long whitespace run, producing quadratic backtracking. The fix replaces \s*$ with \s+$.
Any caller that passes untrusted input to trim or rtrim can trigger CPU exhaustion with a string containing a long run of whitespace.
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
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BAKERSCOT | String::Util |
Affected:
0 , < 1.36
(custom)
|
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CVE-2026-15154 (GCVE-0-2026-15154)
Vulnerability from cvelistv5 – Published: 2026-07-08 19:50 – Updated: 2026-07-08 20:38
VLAI
EPSS
VEX
Title
Guardrails-detectors: guardrails-detectors: unauthenticated regular-expression denial of service (redos) via detector_params.regex
Summary
A flaw was found in `guardrails-detectors`, a component of Red Hat OpenShift AI. This vulnerability, known as Regular Expression Denial of Service (ReDoS), allows a remote attacker to provide specially crafted regular expressions to the public detection API. This can cause catastrophic backtracking, leading to a worker process consuming 100% CPU indefinitely and resulting in a denial of service for the entire guardrails-mediated LLM pipeline.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-15154 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2498188 | issue-trackingx_refsource_REDHAT |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
Date Public
2026-07-08 18:43
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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
EPSS
VEX
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: 2026-06-23 16:13 X_Open Source
VLAI
EPSS
VEX
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… | vendor-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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CVE-2026-22691 (GCVE-0-2026-22691)
Vulnerability from cvelistv5 – Published: 2026-01-10 04:46 – Updated: 2026-01-12 16:48
VLAI
EPSS
VEX
Title
pypdf has possible long runtimes for malformed startxref
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for malformed startxref. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for invalid startxref entries. When rebuilding the cross-reference table, PDF files with lots of whitespace characters become problematic. Only the non-strict reading mode is affected. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3594 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/294165726b… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.6.0 | x_refsource_MISC |
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CVE-2026-22809 (GCVE-0-2026-22809)
Vulnerability from cvelistv5 – Published: 2026-01-13 19:36 – Updated: 2026-01-13 19:47
VLAI
EPSS
VEX
Title
tarteaucitron.js has Regular Expression Denial of Service (ReDoS) vulnerability
Summary
tarteaucitron.js is a compliant and accessible cookie banner. Prior to 1.29.0, a Regular Expression Denial of Service (ReDoS) vulnerability was identified in tarteaucitron.js in the handling of the issuu_id parameter. This vulnerability is fixed in 1.29.0.
Severity
4.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/AmauriC/tarteaucitron.js/secur… | x_refsource_CONFIRM |
| https://github.com/AmauriC/tarteaucitron.js/commi… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AmauriC | tarteaucitron.js |
Affected:
< 1.29.0
|
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CVE-2026-23897 (GCVE-0-2026-23897)
Vulnerability from cvelistv5 – Published: 2026-02-04 19:18 – Updated: 2026-02-04 19:55
VLAI
EPSS
VEX
Title
Apollo Server is vulnerable to denial of service with `startStandaloneServer`
Summary
Apollo Server is an open-source, spec-compliant GraphQL server that's compatible with any GraphQL client, including Apollo Client. In versions from 2.0.0 to 3.13.0, 4.2.0 to before 4.13.0, and 5.0.0 to before 5.4.0, the default configuration of startStandaloneServer from @apollo/server/standalone is vulnerable to denial of service (DoS) attacks through specially crafted request bodies with exotic character set encodings. This issue does not affect users that use @apollo/server as a dependency for integration packages, like @as-integrations/express5 or @as-integrations/next, only direct usage of startStandaloneServer.
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
3 references
| URL | Tags |
|---|---|
| https://github.com/apollographql/apollo-server/se… | x_refsource_CONFIRM |
| https://github.com/apollographql/apollo-server/co… | x_refsource_MISC |
| https://github.com/apollographql/apollo-server/co… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| apollographql | apollo-server |
Affected:
>= 2.0.0, <= 3.13.0
Affected: >= 4.2.0, < 4.13.0 Affected: >= 5.0.0, < 5.4.0 |
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CVE-2026-23956 (GCVE-0-2026-23956)
Vulnerability from cvelistv5 – Published: 2026-01-22 01:23 – Updated: 2026-05-20 00:53
VLAI
EPSS
VEX
Title
seroval affected by Denial of Service via RegExp serialization
Summary
seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 0.2.0 through 1.4.0, overriding RegExp serialization with extremely large patterns can exhaust JavaScript runtime memory during deserialization. Additionally, overriding RegExp serialization with patterns that trigger catastrophic backtracking can lead to ReDoS (Regular Expression Denial of Service). This issue has been fixed in version 1.4.1.
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
3 references
| URL | Tags |
|---|---|
| https://github.com/lxsmnsyc/seroval/security/advi… | x_refsource_CONFIRM |
| https://github.com/lxsmnsyc/seroval/commit/ce9408… | x_refsource_MISC |
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CVE-2026-24001 (GCVE-0-2026-24001)
Vulnerability from cvelistv5 – Published: 2026-01-22 02:23 – Updated: 2026-06-30 12:06
VLAI
EPSS
VEX
Title
jsdiff has a Denial of Service vulnerability in parsePatch and applyPatch
Summary
jsdiff is a JavaScript text differencing implementation. Prior to versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1, attempting to parse a patch whose filename headers contain the line break characters `\r`, `\u2028`, or `\u2029` can cause the `parsePatch` method to enter an infinite loop. It then consumes memory without limit until the process crashes due to running out of memory. Applications are therefore likely to be vulnerable to a denial-of-service attack if they call `parsePatch` with a user-provided patch as input. A large payload is not needed to trigger the vulnerability, so size limits on user input do not provide any protection. Furthermore, some applications may be vulnerable even when calling `parsePatch` on a patch generated by the application itself if the user is nonetheless able to control the filename headers (e.g. by directly providing the filenames of the files to be diffed). The `applyPatch` method is similarly affected if (and only if) called with a string representation of a patch as an argument, since under the hood it parses that string using `parsePatch`. Other methods of the library are unaffected. Finally, a second and lesser interdependent bug - a ReDOS - also exhibits when those same line break characters are present in a patch's *patch* header (also known as its "leading garbage"). A maliciously-crafted patch header of length *n* can take `parsePatch` O(*n*³) time to parse. Versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1 contain a fix. As a workaround, do not attempt to parse patches that contain any of these characters: `\r`, `\u2028`, or `\u2029`.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/kpdecker/jsdiff/security/advis… | x_refsource_CONFIRM |
| https://github.com/kpdecker/jsdiff/issues/653 | x_refsource_MISC |
| https://github.com/kpdecker/jsdiff/pull/649 | x_refsource_MISC |
| https://github.com/kpdecker/jsdiff/commit/15a1585… | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2026-24001 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2431930 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| kpdecker | jsdiff |
Affected:
>= 6.0.0, < 8.0.3
Affected: >= 5.0.0, < 5.2.2 Affected: >= 4.0.0, < 4.0.4 Affected: < 3.5.1 |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
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CVE-2026-25547 (GCVE-0-2026-25547)
Vulnerability from cvelistv5 – Published: 2026-02-04 21:51 – Updated: 2026-02-05 14:31
VLAI
EPSS
VEX
Title
Uncontrolled Resource Consumption in @isaacs/brace-expansion
Summary
@isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @isaacs/brace-expansion is vulnerable to a denial of service (DoS) issue caused by unbounded brace range expansion. When an attacker provides a pattern containing repeated numeric brace ranges, the library attempts to eagerly generate every possible combination synchronously. Because the expansion grows exponentially, even a small input can consume excessive CPU and memory and may crash the Node.js process. This issue has been patched in version 5.0.1.
Severity
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/isaacs/brace-expansion/securit… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| isaacs | brace-expansion |
Affected:
< 5.0.1
|
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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.