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OpenAdvisories
Medium · 5.4 CVE-2026-91942 EUVD-2026-78799GHSA-xjmx-xxmr-qf54

crawl4ai before 0.9.3 Cross-Site Scripting via innerHTML

Published Sep 15, 2026 · Updated Sep 17, 2026 · Assigned by VulnCheck

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

VendorProductAffectedFixed
unclecode crawl4ai < 0.9.3 0.9.3

References