Vulnerability · Published Jun 23, 2026 · Assigned by VulnCheck

CVE-2026-56263Crawl4AI - Stored Cross-Site Scripting in Monitor Dashboard

Medium 6.1

In plain English

A medium-severity cross-site scripting in Crawl4AI from Crawl4AI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.3%top 71.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Crawl4AI before 0.8.7 contains a stored cross-site scripting vulnerability in the monitor dashboard that renders crawl URLs and error messages via innerHTML without escaping. An attacker can submit a crafted crawl request with malicious markup that executes in an operator's browser when viewing the dashboard.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	crawl4ai	0.8.7	GHSA-365w-hqf6-vxfg
PyPI	crawl4ai	0.8.7	GHSA-8qrg-7j2f-rf2h
PyPI	crawl4ai	0.8.7	PYSEC-2026-229
PyPI	crawl4ai	0.8.7	PYSEC-2026-230
PyPI	crawl4ai	0.8.7	PYSEC-2026-239
PyPI	crawl4ai	0.8.7	PYSEC-2026-3443
PyPI	crawl4ai	0.8.7	PYSEC-2026-3449
PyPI	crawl4ai	0.8.7	PYSEC-2026-596
PyPI	crawl4ai	0.8.7	PYSEC-2026-798

Affected products (as reported)

Vendor	Product	Versions
Crawl4AI	Crawl4AI	0 – before 0.8.7

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg vendor-advisory
https://github.com/unclecode/crawl4ai product
VulnCheck Advisory: Crawl4AI - Stored Cross-Site Scripting in Monitor Dashboard third-party-advisory