What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-23 · updated 2026-06-25
• Weakness: CWE-22

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 products

• unclecode crawl4ai: before 0.8.8 — fixed in 0.8.8

How to fix

Upgrade to a fixed version: unclecode crawl4ai 0.8.8. Check the vendor advisory for mitigations.

References

• https://github.com/unclecode/crawl4ai/security/advisories/GHSA-7cx2-g3h9-382p
• https://www.vulncheck.com/advisories/crawl4ai-arbitrary-file-write-via-output-path-symlink-and-toctou

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