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PatchSiren cyber security CVE debrief

CVE-2026-26216 unclecode CVE debrief

CVE-2026-26216 is a critical remote code execution vulnerability in Crawl4AI versions prior to 0.8.0. The vulnerability exists in the Docker API deployment and is accessible through the /crawl endpoint, which accepts a hooks parameter containing Python code executed using exec(). The __import__ builtin was included in the allowed builtins, allowing unauthenticated remote attackers to import arbitrary modules and execute system commands. Successful exploitation allows full server compromise, including arbitrary command execution, file read and write access, sensitive data exfiltration, and lateral movement within internal networks.

Vendor
unclecode
Product
Crawl4AI
CVSS
CRITICAL 10
CISA KEV
Not listed in stored evidence
Original CVE published
2026-02-12
Original CVE updated
2026-07-14
Advisory published
2026-02-12
Advisory updated
2026-07-14

Who should care

Organizations using Crawl4AI versions prior to 0.8.0 should prioritize upgrading to version 0.8.0 or later to mitigate this critical vulnerability. The vulnerability's high CVSS score of 10 and potential for full server compromise make it essential for security teams to take immediate action.

Technical summary

The CVE-2026-26216 vulnerability in Crawl4AI allows unauthenticated remote attackers to execute arbitrary code on the server. The /crawl endpoint accepts a hooks parameter containing Python code, which is executed using the exec() function. The inclusion of the __import__ builtin in the allowed builtins enables attackers to import arbitrary modules and execute system commands. This vulnerability has a CVSS score of 10, indicating a critical severity level.

Defensive priority

High

Recommended defensive actions

  • Upgrade Crawl4AI to version 0.8.0 or later
  • Restrict access to the /crawl endpoint
  • Implement input validation and sanitization for the hooks parameter
  • Monitor for suspicious activity and implement logging and auditing
  • Consider implementing a web application firewall (WAF) to detect and prevent attacks

Evidence notes

The CVE-2026-26216 vulnerability was reported in the NVD database and has a CVSS score of 10. The vulnerability exists in Crawl4AI versions prior to 0.8.0 and can be exploited through the /crawl endpoint. The __import__ builtin was included in the allowed builtins, allowing unauthenticated remote attackers to import arbitrary modules and execute system commands.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-02-12T16:16:17.447Z and has not been modified since then.