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.
792 vulnerabilities reference this CWE, most recent first.
CVE-2024-9277 (GCVE-0-2024-9277)
Vulnerability from cvelistv5 – Published: 2024-09-27 11:00 – Updated: 2024-09-27 15:02
VLAI
EPSS
VEX
Title
Langflow HTTP POST Request utils.py redos
Summary
A vulnerability classified as problematic was found in Langflow up to 1.0.18. Affected by this vulnerability is an unknown functionality of the file \src\backend\base\langflow\interface\utils.py of the component HTTP POST Request Handler. The manipulation of the argument remaining_text leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-27 15:01 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.278659 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.278659 | signaturepermissions-required |
| https://vuldb.com/?submit.410043 | third-party-advisory |
| https://rumbling-slice-eb0.notion.site/Remote-Red… | exploit |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Langflow |
Affected:
1.0.0
Affected: 1.0.1 Affected: 1.0.2 Affected: 1.0.3 Affected: 1.0.4 Affected: 1.0.5 Affected: 1.0.6 Affected: 1.0.7 Affected: 1.0.8 Affected: 1.0.9 Affected: 1.0.10 Affected: 1.0.11 Affected: 1.0.12 Affected: 1.0.13 Affected: 1.0.14 Affected: 1.0.15 Affected: 1.0.16 Affected: 1.0.17 Affected: 1.0.18 |
|
| langflow | langflow |
Affected:
1.0.0 , ≤ 1.0.18
(custom)
cpe:2.3:a:langflow:langflow:-:*:*:*:*:*:*:* |
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CVE-2024-8998 (GCVE-0-2024-8998)
Vulnerability from cvelistv5 – Published: 2025-03-20 10:11 – Updated: 2025-04-04 08:45
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 lunary-ai/lunary version git f07a845. The server uses the regex /{.*?}/ to match user-controlled strings. In the default JavaScript regex engine, this regex can take polynomial time to match certain crafted user inputs. As a result, an attacker can cause the server to hang for an arbitrary amount of time by submitting a specially crafted payload. This issue is fixed in version 1.4.26.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-20 15:48 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| lunary-ai | lunary-ai/lunary |
Affected:
unspecified , < 1.4.26
(custom)
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CVE-2024-8789 (GCVE-0-2024-8789)
Vulnerability from cvelistv5 – Published: 2025-03-20 10:10 – Updated: 2025-10-15 12:50
VLAI
EPSS
VEX
Title
Regular Expression Denial of Service (ReDoS) in lunary-ai/lunary
Summary
Lunary-ai/lunary version git 105a3f6 is vulnerable to a Regular Expression Denial of Service (ReDoS) attack. The application allows users to upload their own regular expressions, which are then executed on the server side. Certain regular expressions can have exponential runtime complexity relative to the input size, leading to potential denial of service. An attacker can exploit this by submitting a specially crafted regular expression, causing the server to become unresponsive for an arbitrary length of time.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-20 17:51 UTC
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-2024-8764 (GCVE-0-2024-8764)
Vulnerability from cvelistv5 – Published: 2025-03-20 10:09 – Updated: 2025-10-15 12:49
VLAI
EPSS
VEX
Title
Improper Authorization in lunary-ai/lunary
Summary
A vulnerability in lunary-ai/lunary, as of commit be54057, allows users to upload and execute arbitrary regular expressions on the server side. This can lead to a Denial of Service (DoS) condition, as certain regular expressions can cause excessive resource consumption, blocking the server from processing other requests.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-20 17:53 UTC
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-2024-8763 (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 · CISA-ADP (v2.0.3)
Decision recorded 2025-03-20 17:54 UTC
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 · CISA-ADP (v2.0.3)
Decision recorded 2024-09-12 17:28 UTC
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 · CISA-ADP (v2.0.3)
Decision recorded 2025-03-20 17:54 UTC
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 · CISA-ADP (v2.0.3)
Decision recorded 2024-12-04 15:24 UTC
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 · CISA-ADP (v2.0.3)
Decision recorded 2024-06-28 15:11 UTC
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 · CISA-ADP (v2.0.3)
Decision recorded 2024-06-10 13:47 UTC
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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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.