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PatchSiren cyber security CVE debrief

CVE-2026-65986 cvat-ai CVE debrief

The CVAT tool, used for computer vision tasks, contains a XSS vulnerability in versions 2.5.0 through 2.66.0. This vulnerability is accessible through annotation guide assets and can be exploited by influencing the media type of uploaded files. The issue has been fixed in version 2.67.0. Organizations using CVAT should be aware of this vulnerability and take steps to update to a patched version. The vulnerability can lead to potential security breaches if not addressed. Security teams and vulnerability management teams should review the annotation guide assets and ensure that proper controls are in place to prevent exploitation.

Vendor
cvat-ai
Product
cvat
CVSS
HIGH 8.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-04
Original CVE updated
2026-09-08
Advisory published
2026-08-04
Advisory updated
2026-09-08

Who should care

Organizations using CVAT for computer vision tasks should be aware of this XSS vulnerability and take steps to update to a patched version. Additionally, security teams and vulnerability management teams should review the annotation guide assets and ensure that proper controls are in place to prevent exploitation. CVAT users should also monitor their instances for suspicious activity and review compensating controls for exposed systems.

Technical summary

The CVAT tool contains a XSS vulnerability in versions 2.5.0 through 2.66.0. The vulnerability is accessible through annotation guide assets and can be exploited by influencing the media type of uploaded files. To address this vulnerability, defenders should update to version 2.67.0 or later and review annotation guide assets. Additionally, defenders should monitor CVAT instances for suspicious activity and review compensating controls for exposed systems. The vulnerability can be mitigated by implementing proper security controls and ensuring that CVAT instances are updated to the latest version.

Defensive priority

Organizations using CVAT should prioritize updating to version 2.67.0 or later to address the XSS vulnerability.

Recommended defensive actions

  • Update CVAT to version 2.67.0 or later
  • Review and update annotation guide assets to prevent XSS
  • Monitor CVAT instances for suspicious activity
  • Review compensating controls for exposed systems
  • Perform asset inventory of CVAT instances
  • Implement rollback/change windows for CVAT updates
  • Track exceptions and retest remediated assets

Evidence notes

The CVE record indicates that CVAT versions 2.5.0 through 2.66.0 contain a XSS vulnerability accessible through annotation guide assets. The issue is fixed in version 2.67.0. To verify, defenders should review the annotation guide assets and ensure that the media type of uploaded files is properly handled. Additionally, defenders should monitor CVAT instances for suspicious activity and review compensating controls for exposed systems.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-65986 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-65986

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

  • CVE-2026-65986 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-65986

    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.