MEDIUM

CVE-2026-91944

2026-09-15 CVSS v3.1

CVSS

6.1

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.

Weakness (CWE)

CWE-79 Cross-site Scripting (XSS)

EPSS Score

0.25%

Probability of exploitation in next 30 days

16.4th percentile

References

https://github.com/unclecode/crawl4ai/security/advisories/GHSA-m446-hp3q-qfxp https://www.vulncheck.com/advisories/crawl4ai-before-0.9.3-dom-based-xss-via-playground-ui

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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