Vulnerability · Published Jul 12, 2026 · Assigned by VulnCheck

CVE-2026-56260Crawl4AI - Arbitrary File Write via output_path Parameter

Critical 9.1

In plain English

A critical-severity path traversal 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 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.6%top 48.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Crawl4AI before 0.8.7 contains an arbitrary file write vulnerability in the Docker API server's /screenshot and /pdf endpoints. The output_path parameter accepts arbitrary filesystem paths without validation, allowing an attacker to supply absolute or path-traversal values to write to any location writable by the application's user, overwriting server files and causing denial of service.

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-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

References

https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg vendor-advisory
https://github.com/unclecode/crawl4ai product
VulnCheck Advisory: Crawl4AI - Arbitrary File Write via output_path Parameter third-party-advisory