# CVE-2026-73220: CVAT: Stored XSS via annotation guides in audio tasks

> Attackers can inject malicious scripts into audio annotation guides, executing code in victims' browsers to hijack sessions or perform actions.

- **Severity:** High 8.5 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 20 Aug 2026
- **Updated:** 20 Aug 2026
- **Also known as:** GHSA-chxx-45vm-qhc9

## What is CVE-2026-73220?

CVE-2026-73220 is a high-severity cross-site scripting vulnerability in cvat-ai cvat, published on 20 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

CVAT is an open source interactive video and image annotation tool for computer vision. From 2.68.0 until 2.70.0, the audio-task annotation guide renderer in cvat-ui/src/audio/components/annotation-page/audio-workspace/top-bar/audio-right-group.tsx passes attacker-controlled guide Markdown to MDEditor without the rehype-sanitize plugin. A user who can create or edit an annotation guide can store malicious JavaScript that executes when another user opens the guide. The script can issue arbitrary CVAT requests with the victim user's privileges. This issue is fixed in version 2.70.0.

Weakness: CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page)

## Which versions are affected by CVE-2026-73220?


## How do I fix CVE-2026-73220?

No fix has been published for CVE-2026-73220 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-73220 being exploited?

There is no known exploitation of CVE-2026-73220 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73220 and fix it if it is affected.

What it is: CVE-2026-73220 is a high-severity cross-site scripting vulnerability in cvat-ai cvat, published on 20 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-73220 in the wild and no public exploit code.

Affected product: cvat-ai cvat. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-73220/ (Markdown: https://insights.sbomify.com/CVE-2026-73220/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73220
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73220
- OSV: https://osv.dev/vulnerability/CVE-2026-73220

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73220/
Summaries are generated and may contain mistakes; the official description above is the record.