What is CVE-2026-33890?

CVE-2026-33890 is a critical-severity vulnerability in Franklioxygen Mytube, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-03-27.

How severe is CVE-2026-33890?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Franklioxygen Mytube

CVE-2026-33890

MyTube is a self-hosted downloader and player for several video websites Prior to version 1.8.71, an unauthenticated attacker can register an arbitrary passkey and subsequently authenticate with it to obtain a full admin session. The application exposes passkey registration endpoints without requiring prior authentication. Any successfully authenticated passkey is automatically granted an administrator token, allowing full administrative access to the application. This enables a complete compromise of the application without requiring any existing credentials. Version 1.8.71 fixes the issue.

EPSS: 0.005 (39.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Franklioxygen Mytube — versions < 1.8.71

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33890?: CVE-2026-33890 is a critical-severity vulnerability in Franklioxygen Mytube, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-03-27.
How severe is CVE-2026-33890?: Critical severity. CVSS v3 base score is 9.8 out of 10.