Arbitrary File Write Vulnerability in Crawl4AI Docker API Server
CVE-2026-56260

8.8HIGH

Key Information:

Vendor

Crawl4ai

Status
Crawl4ai
Vendor
CVE Published:
12 July 2026

What is CVE-2026-56260?

Crawl4AI versions prior to 0.8.7 contain a vulnerability that allows attackers to exploit the Docker API server's /screenshot and /pdf endpoints. The output_path parameter does not validate user input, enabling attackers to provide arbitrary filesystem paths. This flaw can lead to unauthorized file writing, permitting the overwriting of server files and potential denial of service, posing a significant risk to the application's integrity and security.

Affected Version(s)

Crawl4AI 0 < 0.8.7

Crawl4AI 0.8.7

References

https://github.com/unclecode/crawl4ai/security/advisories...
vendor-advisory
https://github.com/unclecode/crawl4ai
product
https://www.vulncheck.com/advisories/crawl4ai-arbitrary-f...
third-party-advisory

CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.