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CWE-1333: Inefficient Regular Expression Complexity, page 5

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The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

What the weakness is: CWE-1333 at MITRE

Ask an AI about CWE-1333

Show the promptExplain CWE-1333: Inefficient Regular Expression Complexity and how to prevent and detect it in code. Use https://cwe.mitre.org/data/definitions/1333.html and https://cve.bz/cve/cwe/1333?via=ask-ai-copy for recent CVEs with this weakness. Cite the sources.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this weakness's id and public links.

  1. 7.5CVE-2026-21868EPSS 0.3%

    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 expre…

  2. 5.3CVE-2026-0668EPSS 0.5%

    Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki - VisualData Extension allows Regular Expression Exponential Blowup.This issue affects MediaWiki - VisualData Extension: 1.45.

  3. 8.7CVE-2026-0621EPSS 0.4%

    Anthropic's MCP TypeScript SDK versions up to and including 1.25.1 contain a regular expression denial of service (ReDoS) vulnerability in the UriTemplate class when processing RFC 6570 exploded array patterns. The dynamically generated re…

  4. 7.5CVE-2025-68475EPSS 0.6%

    Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Fedify's document loader.…

  5. 2.7CVE-2025-68142EPSS 0.5%

    PyMdown Extensions is a set of extensions for the `Python-Markdown` markdown project. Versions prior to 10.16.1 have a ReDOS bug found within the figure caption extension (`pymdownx.blocks.caption`). In systems that take unchecked user con…

  6. 7.5CVE-2025-66020EPSS 0.4%

    Valibot helps validate data using a schema. In versions from 0.31.0 to 1.1.0, the EMOJI_REGEX used in the emoji action is vulnerable to a Regular Expression Denial of Service (ReDoS) attack. A short, maliciously crafted string (e.g., <100 …

  7. 9.8CVE-2025-62484EPSS 0.3%

    Inefficient regular expression complexity in certain Zoom Workplace Clients before version 6.5.10 may allow an unauthenticated user to conduct an escalation of privilege via network access.

  8. 6.5CVE-2025-5342EPSS 1.1%

    Zohocorp ManageEngine Exchange Reporter Plus through 5721 are vulnerable to ReDOS vulnerability in the search module.

  9. 7.5CVE-2025-61581EPSS 0.7%Unsupported when assigned

    Inefficient Regular Expression Complexity vulnerability in Apache Traffic Control. This issue affects Apache Traffic Control: all versions. People with access to the management interface of the Traffic Router component could specify mali…

  10. 2.7CVE-2025-61921EPSS 0.5%

    Sinatra is a domain-specific language for creating web applications in Ruby. In versions prior to 4.2.0, there is a denial of service vulnerability in the `If-Match` and `If-None-Match` header parsing component of Sinatra, if the `etag` me…

  11. 5.3CVE-2025-6051EPSS 0.4%

    A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically within the `normalize_numbers()` method of the `EnglishNormalizer` class. This vulnerability affects version…

  12. 7.5CVE-2025-6638EPSS 0.6%

    A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically affecting the MarianTokenizer's `remove_language_code()` method. This vulnerability is present in version 4.…

  13. 8.7CVE-2025-58451EPSS 0.3%

    Cattown is a JavaScript markdown parser. Versions prior to 1.0.2 used regular expressions with inefficient, potentially exponential worst-case complexity. This could cause excessive CPU usage due to excessive backtracking on crafted inputs…

  14. 5.5CVE-2025-9670EPSS 0.5%

    A security flaw has been discovered in mixmark-io turndown up to 7.2.1. This affects an unknown function of the file src/commonmark-rules.js. Performing manipulation results in inefficient regular expression complexity. It is possible to i…

  15. 6.9CVE-2025-43764EPSS 0.3%

    Self-ReDoS (Regular expression Denial of Service) exists with Role Name search field of Kaleo Designer portlet JavaScript in Liferay Portal 7.4.0 through 7.4.3.131, and Liferay DXP 2024.Q4.0 through 2024.Q4.1, 2024.Q3.0 through 2024.Q3.13,…

  16. 4.8CVE-2025-9308EPSS 0.2%

    A vulnerability has been found in yarnpkg Yarn up to 1.22.22. This impacts the function setOptions of the file src/util/request-manager.js. Such manipulation leads to inefficient regular expression complexity. Local access is required to a…

  17. 6.9CVE-2025-54364EPSS 0.4%

    Microsoft Knack 0.12.0 allows Regular expression Denial of Service (ReDoS) in the knack.introspection module. option_descriptions employs an inefficient regular expression pattern: "\s(:param)\s+(.+?)\s:(.*)" that is susceptible to catastr…

  18. 6.9CVE-2025-54363EPSS 0.4%

    Microsoft Knack 0.12.0 allows Regular expression Denial of Service (ReDoS) in the knack.introspection module. extract_full_summary_from_signature employs an inefficient regular expression pattern: "\s(:param)\s+(.+?)\s:(.*)" that is suscep…

  19. 4.3CVE-2025-4690EPSS 0.2%

    A regular expression used by AngularJS'  linky https://docs.angularjs.org/api/ngSanitize/filter/linky  filter to detect URLs in input text is vulnerable to super-linear runtime due to backtracking. With a large carefully-crafted input, thi…

  20. 7.5CVE-2025-33090EPSS 0.4%

    IBM Concert Software 1.0.0 through 1.1.0 could allow a remote attacker to cause a denial of service using a specially crafted regular expression that would cause excessive resource consumption.

  21. 6.5CVE-2025-2937EPSS 0.4%

    An issue has been discovered in GitLab CE/EE affecting all versions from 13.2 before 18.0.6, 18.1 before 18.1.4, and 18.2 before 18.2.2 that could have allowed authenticated users to create a denial of service condition by sending speciall…

  22. 5.3CVE-2025-55152EPSS 0.4%

    oak is a middleware framework for Deno's native HTTP server, Deno Deploy, Node.js 16.5 and later, Cloudflare Workers and Bun. In versions 17.1.5 and below, it's possible to significantly slow down an oak server with specially crafted value…

  23. 5.3CVE-2025-5197EPSS 0.4%

    A Regular Expression Denial of Service (ReDoS) vulnerability exists in the Hugging Face Transformers library, specifically in the `convert_tf_weight_name_to_pt_weight_name()` function. This function, responsible for converting TensorFlow w…

  24. 7.5CVE-2025-54796EPSS 0.5%

    Copyparty is a portable file server. Versions prior to 1.18.9, the filter parameter for the "Recent Uploads" page allows arbitrary RegExes. If this feature is enabled (which is the default), an attacker can craft a filter which deadlocks t…

  25. 5.3CVE-2025-8262EPSS 0.8%

    A vulnerability was found in yarnpkg Yarn up to 1.22.22. It has been classified as problematic. Affected is the function explodeHostedGitFragment of the file src/resolvers/exotics/hosted-git-resolver.js. The manipulation leads to inefficie…

  26. 8.7CVE-2025-6998EPSS 1.0%

    ReDoS in strip_whitespaces() function in cps/string_helper.py in Calibre Web and Autocaliweb allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtrackin…

  27. 7.8CVE-2025-54365EPSS 0.9%

    fastapi-guard is a security library for FastAPI that provides middleware to control IPs, log requests, detect penetration attempts and more. In version 3.0.1, the regular expression patched to mitigate the ReDoS vulnerability by limiting t…

  28. 2.1CVE-2025-7579EPSS 0.4%

    A vulnerability was found in chinese-poetry 0.1. It has been rated as problematic. This issue affects some unknown processing of the file rank/server.js. The manipulation leads to inefficient regular expression complexity. The attack may b…

  29. 5.3CVE-2025-3933EPSS 0.5%

    A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically within the DonutProcessor class's `token2json()` method. This vulnerability affects versions 4.50.3 and earl…

  30. 6.9CVE-2025-53539EPSS 0.5%

    FastAPI Guard is a security library for FastAPI that provides middleware to control IPs, log requests, and detect penetration attempts. fastapi-guard's penetration attempts detection uses regex to scan incoming requests. However, some of t…

  31. 5.3CVE-2025-3264EPSS 0.5%

    A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically in the `get_imports()` function within `dynamic_module_utils.py`. This vulnerability affects versions 4.49.0…

  32. 5.3CVE-2025-3263EPSS 0.5%

    A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically in the `get_configuration_file()` function within the `transformers.configuration_utils` module. The affecte…

  33. 7.5CVE-2025-3262EPSS 0.5%

    A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to inefficient regular expression complexity in the `SETTING_R…

  34. 2.1CVE-2025-7074EPSS 0.7%

    A vulnerability classified as problematic has been found in vercel hyper up to 3.4.1. This affects the function expand/braceExpand/ignoreMap of the file hyper/bin/rimraf-standalone.js. The manipulation leads to inefficient regular expressi…

  35. 7.0CVE-2025-45143EPSS 0.4%

    string-math v1.2.2 was discovered to contain a Regex Denial of Service (ReDoS) which is exploited via a crafted input.

  36. 5.3CVE-2025-43880EPSS 0.3%

    Inefficient regular expression complexity issue exists in GROWI prior to v7.1.6. If exploited, a logged-in user may cause a denial of service (DoS) condition.

  37. 5.5CVE-2025-6493EPSS 0.5%

    A weakness has been identified in CodeMirror up to 5.65.20. Affected is an unknown function of the file mode/markdown/markdown.js of the component Markdown Mode. This manipulation causes inefficient regular expression complexity. It is pos…

  38. 5.5CVE-2025-6492EPSS 0.5%

    A vulnerability has been found in MarkText up to 0.17.1 and classified as problematic. Affected by this vulnerability is the function getRecommendTitleFromMarkdownString of the file marktext/src/main/utils/index.js. The manipulation leads …

  39. 7.5CVE-2024-4025EPSS 0.6%

    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 …

  40. 2.7CVE-2025-48059EPSS 0.6%

    PowSyBl (Power System Blocks) is a framework to build power system oriented software. In com.powsybl:powsybl-iidm-criteria versions 6.3.0 to before 6.7.2 and com.powsybl:powsybl-contingency-api versions 5.0.0 to before 6.3.0, there is a a …

  41. 6.3CVE-2025-48058EPSS 0.4%

    PowSyBl (Power System Blocks) is a framework to build power system oriented software. Prior to version 6.7.2, there is a potential polynomial Regular Expression Denial of Service (ReDoS) vulnerability in the PowSyBl's DataSource mechanism.…

  42. 4.3CVE-2025-6069EPSS 0.6%

    The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.

  43. 5.3CVE-2025-5897EPSS 0.6%

    A vulnerability was found in vuejs vue-cli up to 5.0.8. It has been rated as problematic. This issue affects the function HtmlPwaPlugin of the file packages/@vue/cli-plugin-pwa/lib/HtmlPwaPlugin.js of the component Markdown Code Handler. T…

  44. 5.3CVE-2025-5896EPSS 0.6%

    A vulnerability was found in tarojs taro up to 4.1.1. It has been declared as problematic. This vulnerability affects unknown code of the file taro/packages/css-to-react-native/src/index.js. The manipulation leads to inefficient regular ex…

  45. 2.1CVE-2025-5895EPSS 0.6%

    A vulnerability was found in Metabase 54.10. It has been classified as problematic. This affects the function parseDataUri of the file frontend/src/metabase/lib/dom.js. The manipulation leads to inefficient regular expression complexity. I…

  46. 2.1CVE-2025-5892EPSS 0.6%

    A vulnerability, which was classified as problematic, has been found in RocketChat up to 7.6.1. This issue affects the function parseMessage of the file /apps/meteor/app/irc/server/servers/RFC2813/parseMessage.js. The manipulation of the a…

  47. 2.1CVE-2025-5891EPSS 0.7%

    A vulnerability classified as problematic was found in Unitech pm2 up to 6.0.6. This vulnerability affects unknown code of the file /lib/tools/Config.js. The manipulation leads to inefficient regular expression complexity. The attack can b…

  48. 5.3CVE-2025-5890EPSS 0.4%

    A vulnerability classified as problematic has been found in actions toolkit 0.5.0. This affects the function globEscape of the file toolkit/packages/glob/src/internal-pattern.ts of the component glob. The manipulation leads to inefficient …

  49. 1.3CVE-2025-5889EPSS 0.6%

    A vulnerability was found in juliangruber brace-expansion up to 1.1.11/2.0.1/3.0.0/4.0.0. It has been rated as problematic. Affected by this issue is the function expand of the file index.js. The manipulation leads to inefficient regular e…

  50. 6.6CVE-2025-49007EPSS 0.6%

    Rack is a modular Ruby web server interface. Starting in version 3.1.0 and prior to version 3.1.16, there is a denial of service vulnerability in the Content-Disposition parsing component of Rack. This is very similar to the previous secur…