CVE-2026-115508 (CVSS 6.5)

Description

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.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-1333 CWE-1333

References

Other References

https://github.com/unclecode/crawl4ai https://github.com/unclecode/crawl4ai/commit/8aea2006e2cdb96a185e50b20633fc323dff6429 https://github.com/unclecode/crawl4ai/releases/tag/v0.9.5 https://github.com/unclecode/crawl4ai/security/advisories/GHSA-j843-8p47-rhxp https://www.vulncheck.com/advisories/crawl4ai-0.7.0-before-0.9.5-redos-via-crawl-regex-fields

Frequently Asked Questions

What is CVE-2026-115508? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-115508? +

CVE-2026-115508 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2026-115508? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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