Medium severity6.1NVD Advisory· Published Sep 15, 2026· Updated Sep 17, 2026
CVE-2026-91944
CVE-2026-91944
Description
crawl4ai versions before 0.9.3 contain a DOM-based cross-site scripting vulnerability in the Playground UI where the forceHighlightElement() function assigns textContent back to innerHTML, re-parsing JSON responses as HTML. Attackers can inject malicious scripts through crawled page content like the page title to steal the operator's API token from sessionStorage and gain full server control.
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Affected products
2Patches
Vulnerability mechanics
References
2News mentions
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