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CVE-2026-23516: CVAT vulnerable to XSS via skeleton SVG images

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-21 · updated 2026-06-17
• Weakness: CWE-83

Description

CVAT is an open source interactive video and image annotation tool for computer vision. In versions 2.2.0 through 2.54.0, an attacker is able to execute arbitrary JavaScript in a victim user's CVAT UI session, provided that they are able to create a maliciously crafted label in a CVAT task or project, then get the victim user to either edit that label, or view a shape that refers to that label; and/or get the victim user to upload a maliciously crafted SVG image when configuring a skeleton. This gives the attacker temporary access to all CVAT resources that the victim user can access. Version 2.55.0 fixes the issue.

Affected products

• Cvat Computer Vision Annotation Tool: from 2.2.0 before 2.55.0 — fixed in 2.55.0

How to fix

Upgrade to a fixed version: Cvat Computer Vision Annotation Tool 2.55.0. Check the vendor advisory for mitigations.

References

• https://github.com/cvat-ai/cvat/commit/40800707fe39e3ff76c8d036eb953eb12d764e70
• https://github.com/cvat-ai/cvat/security/advisories/GHSA-3m7p-wx65-c7mp

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