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

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- franklioxygen / MyTube: < 1.10.6 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 6.8 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-352

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/franklioxygen/MyTube/security/advisories/GHSA-9qxv-p8j9-gv5r (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/franklioxygen/MyTube/commit/b2000d8b239fd2e44b0e6160137c8b636a09cc89 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-63433; retrieved 2026-11-03; source updated 2026-11-03

Revision: 8ab3cb4b9ebc3718bd57d0c9182c6ccea894db70f01ec7ac61c27bd47f74b4f5

Canonical: https://y2.dev/cve/CVE-2026-63433

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