CVE-2026-115508
Crawl4AI 0.7.0 before 0.9.5 ReDoS via /crawl Regex Fields
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1333 |
| Vendor | unclecode |
| Product | crawl4ai |
| Published | Oct 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
unclecode / crawl4ai
0.7.0 < 0.9.5
References
github.com: https://github.com/unclecode/crawl4ai/security/advisories/GHSA-j843-8p47-rhxp github.com: https://github.com/unclecode/crawl4ai/commit/8aea2006e2cdb96a185e50b20633fc323dff6429 github.com: https://github.com/unclecode/crawl4ai/releases/tag/v0.9.5 github.com: https://github.com/unclecode/crawl4ai vulncheck.com: https://www.vulncheck.com/advisories/crawl4ai-0.7.0-before-0.9.5-redos-via-crawl-regex-fields
Credits
Zhixi Sun (manus-use) Siyang Wu