---
id: CVE-2026-115508
title: Crawl4AI 0.7.0 before 0.9.5 ReDoS via /crawl Regex Fields
summary: >-
  Crawl4AI 0.7.0 before 0.9.5 contains an inefficient regular expression
  complexity vulnerability in the Docker API server that allows authenticated
  API clients to supply unbounded regular expressions in /crawl request bodies.
  Attackers ca…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-1333
vendor: unclecode
product: crawl4ai
affected:
  - crawl4ai >= 0.7.0 < 0.9.5
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T19:14:07.893Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115508'
references:
  - url: >-
      https://github.com/unclecode/crawl4ai/security/advisories/GHSA-j843-8p47-rhxp
    label: GitHub Security Advisory (GHSA-j843-8p47-rhxp)
  - url: >-
      https://github.com/unclecode/crawl4ai/commit/8aea2006e2cdb96a185e50b20633fc323dff6429
  - url: 'https://github.com/unclecode/crawl4ai/releases/tag/v0.9.5'
    label: crawl4ai v0.9.5 Release Notes
  - url: 'https://github.com/unclecode/crawl4ai'
  - url: >-
      https://www.vulncheck.com/advisories/crawl4ai-0.7.0-before-0.9.5-redos-via-crawl-regex-fields
    label: >-
      VulnCheck Advisory: Crawl4AI 0.7.0 before 0.9.5 ReDoS via /crawl Regex
      Fields
tags:
  - cve.org
ingestedAt: '2026-10-22T22:00:50.411Z'
---

## Overview

Crawl4AI 0.7.0 before 0.9.5 contains an inefficient regular expression complexity vulnerability in the Docker API server that allows authenticated API clients to supply unbounded regular expressions in /crawl request bodies. Attackers can submit catastrophic-backtracking patterns via RegexExtractionStrategy.custom, RegexChunking.patterns or JsonCss, JsonXPath and JsonLxml schema regex fields against a crafted page to freeze the entire server, including /health.

## Affected

- `crawl4ai >= 0.7.0 < 0.9.5`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.