Common Weakness Enumeration
CWE-1333
AllowedInefficient Regular Expression Complexity
Abstraction: Base · Status: Draft
The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
724 vulnerabilities reference this CWE, most recent first.
CVE-2023-25166 (GCVE-0-2023-25166)
Vulnerability from cvelistv5 – Published: 2023-02-08 19:28 – Updated: 2025-03-10 21:14
VLAI
EPSS
VEX
Title
Regular Expression Denial of Service (ReDoS) Vulnerability
Summary
formula is a math and string formula parser. In versions prior to 3.0.1 crafted user-provided strings to formula's parser might lead to polynomial execution time and a denial of service. Users should upgrade to 3.0.1+. There are no known workarounds for this vulnerability.
Severity
5.5 (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://github.com/hapijs/formula/security/adviso… | x_refsource_CONFIRM |
| https://github.com/hapijs/formula/commit/9fbc20a0… | x_refsource_MISC |
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CVE-2023-23925 (GCVE-0-2023-23925)
Vulnerability from cvelistv5 – Published: 2023-02-03 19:05 – Updated: 2025-03-10 21:17
VLAI
EPSS
VEX
Title
Switcher Client contains Regular Expression Denial of Service (ReDoS)
Summary
Switcher Client is a JavaScript SDK to work with Switcher API which is cloud-based Feature Flag. Unsanitized input flows into Strategy match operation (EXIST), where it is used to build a regular expression. This may result in a Regular expression Denial of Service attack (reDOS). This issue has been patched in version 3.1.4. As a workaround, avoid using Strategy settings that use REGEX in conjunction with EXIST and NOT_EXIST operations.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/switcherapi/switcher-client-ma… | x_refsource_CONFIRM |
| https://github.com/switcherapi/switcher-client-ma… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| switcherapi | switcher-client-master |
Affected:
< 3.1.4
|
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CVE-2023-23621 (GCVE-0-2023-23621)
Vulnerability from cvelistv5 – Published: 2023-01-27 23:31 – Updated: 2025-03-10 21:18
VLAI
EPSS
VEX
Title
Discourse vulnerable to ReDoS in user agent parsing
Summary
Discourse is an open-source discussion platform. Prior to version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches, a malicious user can cause a regular expression denial of service using a carefully crafted user agent. This issue is patched in version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches. There are no known workarounds.
Severity
8.6 (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/discourse/discourse/security/a… | x_refsource_CONFIRM |
| https://github.com/discourse/discourse/pull/20002 | x_refsource_MISC |
| https://github.com/discourse/discourse/commit/6d9… | x_refsource_MISC |
Impacted products
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CVE-2023-22467 (GCVE-0-2023-22467)
Vulnerability from cvelistv5 – Published: 2023-01-04 21:52 – Updated: 2025-02-13 16:43
VLAI
EPSS
VEX
Title
luxon.js inefficient regular expression complexity vulnerability
Summary
Luxon is a library for working with dates and times in JavaScript. On the 1.x branch prior to 1.38.1, the 2.x branch prior to 2.5.2, and the 3.x branch on 3.2.1, Luxon's `DateTime.fromRFC2822() has quadratic (N^2) complexity on some specific inputs. This causes a noticeable slowdown for inputs with lengths above 10k characters. Users providing untrusted data to this method are therefore vulnerable to (Re)DoS attacks. This issue also appears in Moment as CVE-2022-31129. Versions 1.38.1, 2.5.2, and 3.2.1 contain patches for this issue. As a workaround, limit the length of the input.
Severity
7.5 (High)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/moment/luxon/security/advisori… | x_refsource_CONFIRM |
| https://github.com/moment/moment/security/advisor… | x_refsource_MISC |
| https://github.com/moment/moment/pull/6015#issuec… | x_refsource_MISC |
| https://github.com/moment/luxon/commit/5ab3bf64a1… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | |
| https://lists.fedoraproject.org/archives/list/pac… |
Impacted products
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CVE-2023-7279 (GCVE-0-2023-7279)
Vulnerability from cvelistv5 – Published: 2024-09-02 14:00 – Updated: 2024-09-03 14:15
VLAI
EPSS
VEX
Title
Secure Systems Engineering Connaisseur Delegation Name targets_schema.json redos
Summary
A vulnerability has been found in Secure Systems Engineering Connaisseur up to 3.3.0 and classified as problematic. This vulnerability affects unknown code of the file connaisseur/res/targets_schema.json of the component Delegation Name Handler. The manipulation leads to inefficient regular expression complexity. The complexity of an attack is rather high. The exploitation appears to be difficult. Upgrading to version 3.3.1 is able to address this issue. The name of the patch is 524b73ff7306707f6d3a4d1e86401479bca91b02. It is recommended to upgrade the affected component.
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://vuldb.com/?id.276268 | vdb-entry |
| https://vuldb.com/?ctiid.276268 | signaturepermissions-required |
| https://github.com/sse-secure-systems/connaisseur… | issue-tracking |
| https://github.com/sse-secure-systems/connaisseur… | patch |
| https://github.com/sse-secure-systems/connaisseur… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Secure Systems Engineering | Connaisseur |
Affected:
3.0
Affected: 3.1 Affected: 3.2 Affected: 3.3 |
Credits
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CVE-2023-6736 (GCVE-0-2023-6736)
Vulnerability from cvelistv5 – Published: 2024-02-07 22:02 – Updated: 2026-04-24 04:07
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in GitLab
Summary
An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.
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://gitlab.com/gitlab-org/gitlab/-/issues/435036 | issue-trackingpermissions-required |
| https://hackerone.com/reports/2269023 | technical-descriptionexploitpermissions-required |
Impacted products
Credits
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CVE-2023-6688 (GCVE-0-2023-6688)
Vulnerability from cvelistv5 – Published: 2024-05-09 01:38 – Updated: 2024-10-03 06:23
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in GitLab
Summary
An issue has been discovered in GitLab CE/EE affecting all versions starting from 16.11 prior to 16.11.2. A problem with the processing logic for Google Chat Messages integration may lead to a regular expression DoS attack on the server.
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://gitlab.com/gitlab-org/gitlab/-/issues/434854 | issue-trackingpermissions-required |
| https://hackerone.com/reports/2270362 | technical-descriptionexploitpermissions-required |
Impacted products
Credits
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CVE-2023-6682 (GCVE-0-2023-6682)
Vulnerability from cvelistv5 – Published: 2024-05-09 01:42 – Updated: 2024-10-03 06:23
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in GitLab
Summary
An issue has been discovered in GitLab CE/EE affecting all versions starting from 16.9 prior to 16.9.7, starting from 16.10 prior to 16.10.5, and starting from 16.11 prior to 16.11.2. A problem with the processing logic for Discord Integrations Chat Messages can lead to a regular expression DoS attack on the server.
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://gitlab.com/gitlab-org/gitlab/-/issues/434821 | issue-trackingpermissions-required |
| https://hackerone.com/reports/2269012 | technical-descriptionexploitpermissions-required |
Impacted products
Credits
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CVE-2023-6678 (GCVE-0-2023-6678)
Vulnerability from cvelistv5 – Published: 2024-04-12 00:53 – Updated: 2025-11-20 04:11
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in GitLab
Summary
An issue has been discovered in GitLab EE affecting all versions before 16.8.6, all versions starting from 16.9 before 16.9.4, all versions starting from 16.10 before 16.10.2. It was possible for an attacker to cause a denial of service using malicious crafted content in a junit test report file.
Severity
4.3 (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://gitlab.com/gitlab-org/gitlab/-/issues/434689 | issue-trackingpermissions-required |
| https://hackerone.com/reports/2268037 | technical-descriptionexploitpermissions-required |
Impacted products
Credits
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CVE-2023-6502 (GCVE-0-2023-6502)
Vulnerability from cvelistv5 – Published: 2024-05-23 11:02 – Updated: 2024-10-03 06:23
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in GitLab
Summary
A Denial of Service (DoS) condition has been discovered in GitLab CE/EE affecting all versions before 16.10.6, version 16.11 before 16.11.3, and 17.0 before 17.0.1. It is possible for an attacker to cause a denial of service using a crafted wiki page.
Severity
4.3 (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://gitlab.com/gitlab-org/gitlab/-/issues/433534 | issue-trackingpermissions-required |
| https://hackerone.com/reports/2263638 | technical-descriptionexploitpermissions-required |
Impacted products
Credits
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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.