Vulnerability · Published Jun 23, 2026 · Assigned by VulnCheck

CVE-2026-56258Crawl4AI - Arbitrary File Write via output_path Symlink and TOCTOU

High 8.1

In plain English

A high-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 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.9%top 39.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Crawl4AI before 0.8.8 contains an arbitrary file write vulnerability in the screenshot and PDF endpoints that allows unauthenticated attackers to write files outside the intended directory via symlink and time-of-check-time-of-use (TOCTOU) attacks on the output_path parameter. Remote attackers can exploit insufficient path validation and symlink following to achieve arbitrary file write and potential code execution on systems where the runtime user has write access to executable or cron locations.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	crawl4ai	0.8.8	GHSA-7cx2-g3h9-382p
PyPI	crawl4ai	0.8.8	PYSEC-2026-228

Affected products (as reported)

Vendor	Product	Versions
Crawl4AI	Crawl4AI	0 – before 0.8.8

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

References

GitHub Security Advisory (GHSA-7cx2-g3h9-382p) vendor-advisory
VulnCheck Advisory: Crawl4AI - Arbitrary File Write via output_path Symlink and TOCTOU third-party-advisory