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PatchSiren cyber security CVE debrief

CVE-2026-56260 Crawl4AI CVE debrief

CVE-2026-56260 is an arbitrary file write vulnerability in Crawl4AI before 0.8.7. The vulnerability exists in the Docker API server's /screenshot and /pdf endpoints, where the output_path parameter accepts arbitrary filesystem paths without validation. This allows 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 product deployments should be reviewed for exposure, and compensating controls should be considered while remediation is scheduled.

Vendor
Crawl4AI
Product
Unknown
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-12
Original CVE updated
2026-07-13
Advisory published
2026-07-12
Advisory updated
2026-07-13

Who should care

Users of Crawl4AI before version 0.8.7 should be aware of this vulnerability and take immediate action to upgrade to a patched version. Additionally, administrators and security teams responsible for systems utilizing Crawl4AI should prioritize patching and monitor for potential exploitation attempts.

Technical summary

The vulnerability is caused by the lack of validation in the output_path parameter of the /screenshot and /pdf endpoints in the Docker API server. This allows an attacker to write arbitrary files to the system, potentially leading to denial of service or further exploitation. The CVSS score for this vulnerability is 8.8, indicating a high severity level. Affected product deployments should be reviewed for exposure, and compensating controls should be considered while remediation is scheduled.

Defensive priority

High

Recommended defensive actions

  • Upgrade Crawl4AI to version 0.8.7 or later
  • Review and restrict access to the Docker API server's /screenshot and /pdf endpoints
  • Monitor for potential exploitation attempts and anomalies in system logs
  • Implement additional security measures such as input validation and file system access controls
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record was published on 2026-07-12T12:16:45.153Z and has not been modified since then. The NVD entry is currently in the 'Received' status. The vulnerability was reported by Vulncheck and has a CVSS score of 8.8. Evidence is limited, and defenders should verify affected scope and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-56260 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-56260

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-56260 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-56260

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.