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-2024-1493 (GCVE-0-2024-1493)
Vulnerability from cvelistv5 – Published: 2024-06-26 23:31 – Updated: 2024-08-30 13:24
VLAI
EPSS
VEX
Title
Uncontrolled Resource Consumption in GitLab
Summary
An issue was discovered in GitLab CE/EE affecting all versions starting from 9.2 prior to 16.11.5, starting from 17.0 prior to 17.0.3, and starting from 17.1 prior to 17.1.1, with the processing logic for generating link in dependency files 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/441806 | issue-trackingpermissions-required |
| https://hackerone.com/reports/2370084 | technical-descriptionexploitpermissions-required |
Impacted products
Credits
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CVE-2023-45813 (GCVE-0-2023-45813)
Vulnerability from cvelistv5 – Published: 2023-10-18 20:26 – Updated: 2024-09-13 14:39
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in TorBot
Summary
Torbot is an open source tor network intelligence tool. In affected versions the `torbot.modules.validators.validate_link function` uses the python-validators URL validation regex. This particular regular expression has an exponential complexity which allows an attacker to cause an application crash using a well-crafted argument. An attacker can use a well-crafted URL argument to exploit the vulnerability in the regular expression and cause a Denial of Service on the system. The validators file has been removed in version 4.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
4.6 (Medium)
SSVC
Exploitation: poc
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/DedSecInside/TorBot/security/a… | x_refsource_CONFIRM |
| https://github.com/DedSecInside/TorBot/commit/ef6… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| DedSecInside | TorBot |
Affected:
< 4.0.0
|
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CVE-2023-45806 (GCVE-0-2023-45806)
Vulnerability from cvelistv5 – Published: 2023-11-10 14:43 – Updated: 2024-09-03 17:43
VLAI
EPSS
VEX
Title
Discourse vulnerable to DoS via Regexp Injection in Full Name
Summary
Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches, if a user has been quoted and uses a `|` in their full name, they might be able to trigger a bug that generates a lot of duplicate content in all the posts they've been quoted by updating their full name again. Version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches contain a patch for this issue. No known workaround exists, although one can stop the "bleeding" by ensuring users only use alphanumeric characters in their full name field.
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
3 references
| URL | Tags |
|---|---|
| https://github.com/discourse/discourse/security/a… | x_refsource_CONFIRM |
| https://github.com/discourse/discourse/commit/2ec… | x_refsource_MISC |
| https://github.com/discourse/discourse/commit/7d4… | x_refsource_MISC |
Impacted products
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CVE-2023-43646 (GCVE-0-2023-43646)
Vulnerability from cvelistv5 – Published: 2023-09-26 18:19 – Updated: 2024-09-24 17:26
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in get-func-name
Summary
get-func-name is a module to retrieve a function's name securely and consistently both in NodeJS and the browser. Versions prior to 2.0.1 are subject to a regular expression denial of service (redos) vulnerability which may lead to a denial of service when parsing malicious input. This vulnerability can be exploited when there is an imbalance in parentheses, which results in excessive backtracking and subsequently increases the CPU load and processing time significantly. This vulnerability can be triggered using the following input: '\t'.repeat(54773) + '\t/function/i'. This issue has been addressed in commit `f934b228b` which has been included in releases from 2.0.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/chaijs/get-func-name/security/… | x_refsource_CONFIRM |
| https://github.com/chaijs/get-func-name/commit/f9… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| chaijs | get-func-name |
Affected:
< 2.0.1
|
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CVE-2023-36543 (GCVE-0-2023-36543)
Vulnerability from cvelistv5 – Published: 2023-07-12 09:17 – Updated: 2024-10-04 13:47
VLAI
EPSS
VEX
Title
Apache Airflow: ReDoS via dags function
Summary
Apache Airflow, versions before 2.6.3, has a vulnerability where an authenticated user can use crafted input to make the current request hang. It is recommended to upgrade to a version that is not affected
Severity
No CVSS data available.
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/apache/airflow/pull/32060 | patch |
| https://lists.apache.org/thread/tokfs980504ylgk3c… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Airflow |
Affected:
0 , < 2.6.3
(semver)
|
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CVE-2023-34104 (GCVE-0-2023-34104)
Vulnerability from cvelistv5 – Published: 2023-06-06 17:35 – Updated: 2024-08-02 16:01
VLAI
EPSS
VEX
Title
Regex Injection via Doctype Entities
Summary
fast-xml-parser is an open source, pure javascript xml parser. fast-xml-parser allows special characters in entity names, which are not escaped or sanitized. Since the entity name is used for creating a regex for searching and replacing entities in the XML body, an attacker can abuse it for denial of service (DoS) attacks. By crafting an entity name that results in an intentionally bad performing regex and utilizing it in the entity replacement step of the parser, this can cause the parser to stall for an indefinite amount of time. This problem has been resolved in v4.2.4. Users are advised to upgrade. Users unable to upgrade should avoid using DOCTYPE parsing by setting the `processEntities: false` option.
Severity
7.5 (High)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/NaturalIntelligence/fast-xml-p… | x_refsource_CONFIRM |
| https://github.com/NaturalIntelligence/fast-xml-p… | x_refsource_MISC |
| https://github.com/NaturalIntelligence/fast-xml-p… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| NaturalIntelligence | fast-xml-parser |
Affected:
>= 4.1.3, < 4.2.4
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CVE-2023-33950 (GCVE-0-2023-33950)
Vulnerability from cvelistv5 – Published: 2023-05-24 16:10 – Updated: 2024-10-22 15:51
VLAI
EPSS
VEX
Summary
Pattern Redirects in Liferay Portal 7.4.3.48 through 7.4.3.76, and Liferay DXP 7.4 update 48 through 76 allows regular expressions that are vulnerable to ReDoS attacks to be used as patterns, which allows remote attackers to consume an excessive amount of server resources via crafted request URLs.
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
1 reference
| URL | Tags |
|---|---|
| https://liferay.dev/portal/security/known-vulnera… | vendor-advisory |
Impacted products
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CVE-2023-30858 (GCVE-0-2023-30858)
Vulnerability from cvelistv5 – Published: 2023-04-28 20:49 – Updated: 2025-01-30 18:44
VLAI
EPSS
VEX
Title
Denosaurs emoji has ReDoS vulnerability in `replace` function
Summary
The Denosaurs emoji package provides emojis for dinosaurs. Starting in version 0.1.0 and prior to version 0.3.0, the reTrimSpace regex has 2nd degree polynomial inefficiency, leading to a delayed response given a big payload. The issue has been patched in 0.3.0. As a workaround, avoid using the `replace`, `unemojify`, or `strip` functions.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
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/denosaurs/emoji/security/advis… | x_refsource_CONFIRM |
| https://github.com/denosaurs/emoji/pull/11 | x_refsource_MISC |
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CVE-2023-30608 (GCVE-0-2023-30608)
Vulnerability from cvelistv5 – Published: 2023-04-18 21:32 – Updated: 2025-11-03 21:48
VLAI
EPSS
VEX
Title
Parser contains an inefficient regular expression in sqlparse
Summary
sqlparse is a non-validating SQL parser module for Python. In affected versions the SQL parser contains a regular expression that is vulnerable to ReDoS (Regular Expression Denial of Service). This issue was introduced by commit `e75e358`. The vulnerability may lead to Denial of Service (DoS). This issues has been fixed in sqlparse 0.4.4 by commit `c457abd5f`. Users are advised to upgrade. There are no known workarounds for this issue.
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
6 references
| URL | Tags |
|---|---|
| https://github.com/andialbrecht/sqlparse/security… | x_refsource_CONFIRM |
| https://github.com/andialbrecht/sqlparse/commit/c… | x_refsource_MISC |
| https://github.com/andialbrecht/sqlparse/commit/e… | x_refsource_MISC |
| https://owasp.org/www-community/attacks/Regular_e… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2023… | |
| https://lists.debian.org/debian-lts-announce/2024… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| andialbrecht | sqlparse |
Affected:
>= 0.1.15, < 0.4.4
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CVE-2023-25167 (GCVE-0-2023-25167)
Vulnerability from cvelistv5 – Published: 2023-02-08 19:31 – Updated: 2025-03-10 21:14
VLAI
EPSS
VEX
Title
Regular expression denial of service via installing themes via git in discourse
Summary
Discourse is an open source discussion platform. In affected versions a malicious user can cause a regular expression denial of service using a carefully crafted git URL. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. There are no known workarounds for this issue.
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://github.com/discourse/discourse/security/a… | x_refsource_CONFIRM |
| https://github.com/discourse/discourse/commit/ec4… | x_refsource_MISC |
Impacted products
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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.