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-2024-8763 (GCVE-0-2024-8763)
Vulnerability from cvelistv5 – Published: 2025-03-20 10:08 – Updated: 2025-10-15 12:50
VLAI
EPSS
VEX
Title
Regular Expression Denial of Service (ReDoS) in lunary-ai/lunary
Summary
A Regular Expression Denial of Service (ReDoS) vulnerability exists in the lunary-ai/lunary repository, specifically in the compileTextTemplate function. The affected version is git be54057. An attacker can exploit this vulnerability by manipulating the regular expression /{{(.*?)}}/g, causing the server to hang indefinitely and become unresponsive to any requests. This is due to the regular expression's susceptibility to second-degree polynomial time complexity, which can be triggered by a large number of braces in the input.
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
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| lunary-ai | lunary-ai/lunary |
Affected:
unspecified , < 1.4.23
(custom)
|
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CVE-2024-8124 (GCVE-0-2024-8124)
Vulnerability from cvelistv5 – Published: 2024-09-12 16:56 – Updated: 2024-09-17 11:26
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in GitLab
Summary
An issue was discovered in GitLab CE/EE affecting all versions starting from 16.4 prior to 17.1.7, starting from 17.2 prior to 17.2.5, starting from 17.3 prior to 17.3.2 which could cause Denial of Service via sending a specific POST request.
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://gitlab.com/gitlab-org/gitlab/-/issues/480533 | issue-trackingpermissions-required |
| https://hackerone.com/reports/2634880 | technical-descriptionexploitpermissions-required |
| https://about.gitlab.com/releases/2024/09/11/patc… |
Impacted products
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CVE-2024-7779 (GCVE-0-2024-7779)
Vulnerability from cvelistv5 – Published: 2025-03-20 10:08 – Updated: 2025-10-15 12:50
VLAI
EPSS
VEX
Title
ReDoS (Regular Expression Denial of Service) in danswer-ai/danswer
Summary
A vulnerability in danswer-ai/danswer version 1 allows an attacker to perform a Regular Expression Denial of Service (ReDoS) by manipulating regular expressions. This can significantly slow down the application's response time and potentially render it completely unusable.
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
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| danswer-ai | danswer-ai/danswer |
Affected:
unspecified , ≤ latest
(custom)
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CVE-2024-6232 (GCVE-0-2024-6232)
Vulnerability from cvelistv5 – Published: 2024-09-03 12:29 – Updated: 2025-11-03 22:32
VLAI
EPSS
VEX
Title
Regular-expression DoS when parsing TarFile headers
Summary
There is a MEDIUM severity vulnerability affecting CPython.
Regular expressions that allowed excessive backtracking during tarfile.TarFile header parsing are vulnerable to ReDoS via specifically-crafted tar archives.
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
13 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.8.20
(python)
Affected: 3.9.0 , < 3.9.20 (python) Affected: 3.10.0 , < 3.10.15 (python) Affected: 3.11.0 , < 3.11.10 (python) Affected: 3.12.0 , < 3.12.6 (python) Affected: 3.13.0a1 , < 3.13.0rc2 (python) |
|
| python | cpython |
Affected:
0 , < 3.8.20
(custom)
Affected: 3.9.0 , < 3.9.20 (custom) Affected: 3.10.0 , < 3.10.15 (custom) Affected: 3.11.0 , < 3.11.10 (custom) Affected: 3.12.0 , < 3.12.6 (custom) Affected: 3.13.0a1 , < 3.13.0rc2 (custom) cpe:2.3:a:python:cpython:*:*:*:*:*:*:*:* |
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CVE-2024-6038 (GCVE-0-2024-6038)
Vulnerability from cvelistv5 – Published: 2024-06-27 18:41 – Updated: 2025-10-15 12:50
VLAI
EPSS
VEX
Title
ReDoS Vulnerability in gaizhenbiao/chuanhuchatgpt
Summary
A Regular Expression Denial of Service (ReDoS) vulnerability exists in the latest version of gaizhenbiao/chuanhuchatgpt. The vulnerability is located in the filter_history function within the utils.py module. This function takes a user-provided keyword and attempts to match it against chat history filenames using a regular expression search. Due to the lack of sanitization or validation of the keyword parameter, an attacker can inject a specially crafted regular expression, leading to a denial of service condition. This can cause severe degradation of service performance and potential system unavailability.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| gaizhenbiao | gaizhenbiao/chuanhuchatgpt |
Affected:
unspecified , < 20240918
(custom)
|
|
| gaizhenbiao | chuanhuchatgpt |
Affected:
0
cpe:2.3:a:gaizhenbiao:chuanhuchatgpt:-:*:*:*:*:*:*:* |
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CVE-2024-5552 (GCVE-0-2024-5552)
Vulnerability from cvelistv5 – Published: 2024-06-06 18:09 – Updated: 2024-08-01 21:18
VLAI
EPSS
VEX
Title
ReDoS in kubeflow/kubeflow
Summary
kubeflow/kubeflow is vulnerable to a Regular Expression Denial of Service (ReDoS) attack due to inefficient regular expression complexity in its email validation mechanism. An attacker can remotely exploit this vulnerability without authentication by providing specially crafted input that causes the application to consume an excessive amount of CPU resources. This vulnerability affects the latest version of kubeflow/kubeflow, specifically within the centraldashboard-angular backend component. The impact of exploiting this vulnerability includes resource exhaustion, and service disruption.
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
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| kubeflow | kubeflow/kubeflow |
Affected:
unspecified , ≤ latest
(custom)
|
|
| kubeflow | kubeflow |
Affected:
0 , ≤ 1.8.0
(custom)
cpe:2.3:a:kubeflow:kubeflow:*:*:*:*:*:*:*:* |
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CVE-2024-4148 (GCVE-0-2024-4148)
Vulnerability from cvelistv5 – Published: 2024-06-01 15:54 – Updated: 2025-01-30 13:09
VLAI
EPSS
VEX
Title
Redos (Regular Expression Denial of Service) in lunary-ai/lunary
Summary
A Regular Expression Denial of Service (ReDoS) vulnerability exists in the lunary-ai/lunary application, version 1.2.10. An attacker can exploit this vulnerability by maliciously manipulating regular expressions, which can significantly impact the response time of the application and potentially render it completely non-functional. Specifically, the vulnerability can be triggered by sending a specially crafted request to the application, leading to a denial of service where the application crashes.
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
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| lunary-ai | lunary-ai/lunary |
Affected:
unspecified , < 1.3.4
(custom)
|
|
| lunary-ai | lunary |
Affected:
1.2.10
cpe:2.3:a:lunary-ai:lunary:1.2.10:*:*:*:*:*:*:* |
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CVE-2024-4067 (GCVE-0-2024-4067)
Vulnerability from cvelistv5 – Published: 2024-05-13 10:04 – Updated: 2024-09-17 19:47
VLAI
EPSS
VEX
Title
Regular Expression Denial of Service in micromatch
Summary
The NPM package `micromatch` prior to 4.0.8 is vulnerable to Regular Expression Denial of Service (ReDoS). The vulnerability occurs in `micromatch.braces()` in `index.js` because the pattern `.*` will greedily match anything. By passing a malicious payload, the pattern matching will keep backtracking to the input while it doesn't find the closing bracket. As the input size increases, the consumption time will also increase until it causes the application to hang or slow down. There was a merged fix but further testing shows the issue persists. This issue should be mitigated by using a safe pattern that won't start backtracking the regular expression due to greedy matching. This issue was fixed in version 4.0.8.
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
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| micromatch | micromatch |
Affected:
0 , < 4.0.8
(cpe)
Unaffected: 4.0.8 (cpe) |
|
| micromatch | micromatch |
Affected:
0 , < 4.0.8
(custom)
cpe:2.3:a:micromatch:micromatch:*:*:*:*:*:*:*:* |
Date Public
2024-05-13 12:44
Credits
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CVE-2024-4056 (GCVE-0-2024-4056)
Vulnerability from cvelistv5 – Published: 2024-04-26 06:02 – Updated: 2026-02-23 10:10
VLAI
EPSS
VEX
Title
Denial of service condition in M-Files Server
Summary
Denial of service condition in M-Files Server in versions before 24.4.13592.4 and after 23.11 (excluding 24.2 LTS) allows unauthenticated user to consume computing resources.
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://product.m-files.com/security-advisories/c… | vendor-advisory |
| https://empower.m-files.com/security-advisories/C… | vendor-advisory |
| https://www.m-files.com/about/trust-center/securi… | x_transferred |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| M-Files Corporation | M-Files Server |
Affected:
23.11 , < 24.4.13592.4
(custom)
Unaffected: 24.2 LTS |
|
| m-files | m-files_server |
Affected:
*
cpe:2.3:a:m-files:m-files_server:-:*:*:*:*:*:*:* |
|
| m-files | m-files_server |
Affected:
-
cpe:2.3:a:m-files:m-files_server:-:*:*:*:*:*:*:* |
|
| m-files | m-files_server |
Unknown:
24.2 LTS
cpe:2.3:a:m-files:m-files_server:-:*:*:*:*:*:*:* |
Date Public
2024-04-29 11:05
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CVE-2024-4025 (GCVE-0-2024-4025)
Vulnerability from cvelistv5 – Published: 2025-06-20 18:14 – Updated: 2025-06-23 15:22
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 from 7.10 prior before 16.11.5, version 17.0 before 17.0.3, and 17.1 before 17.1.1. It is possible for an attacker to cause a denial of service using a crafted markdown page.
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/457474 | issue-trackingpermissions-required |
| https://hackerone.com/reports/2024974 | 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.