What’s Vulnerable › Vulnerabilities

CVE-2026-91942: crawl4ai before 0.9.3 Cross-Site Scripting via innerHTML

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-15 · updated 2026-09-17
• Weakness: CWE-79

Description

crawl4ai before 0.9.3 contains a DOM-based cross-site scripting vulnerability in the Docker Playground UI that assigns untrusted crawl results to element.innerHTML. Attackers can craft malicious PDFs with event-handler markup to execute JavaScript in the Playground origin and steal API tokens from sessionStorage for authenticated API abuse.

Affected products

• unclecode crawl4ai: before 0.9.3 — fixed in 0.9.3

How to fix

Upgrade to a fixed version: unclecode crawl4ai 0.9.3. Check the vendor advisory for mitigations.

References

• https://github.com/unclecode/crawl4ai/security/advisories/GHSA-7g3g-vhm6-79f3
• https://www.vulncheck.com/advisories/crawl4ai-before-0.9.3-cross-site-scripting-via-innerhtml
• https://github.com/unclecode/crawl4ai/security/advisories/GHSA-7g3g-vhm6-79f3

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