CVE-2026-91944
MEDIUM
NVD
CVSS Score
6.1
Severity
MEDIUM
Published
Sep 15, 2026
Vendor
unknown
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.