by Kastro
Paper/Archive/CVE-2026-33890

CVE-2026-33890

franklioxygen MyTube — MyTube has an Unauthenticated Admin Privilege Escalation via Passkey Registration

EPSS 0.5%public exploitCVSS 9.8
critical.is priorityof 100
48
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 42.9.429 × 208.6Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
MyTube< 1.8.71–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)8.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/franklioxygen/MyTube/security/advisories/GHSA-378w-xh68-qrc8refgithub.com/franklioxygen/MyTube/commit/d6c1275a7ff7ffd3d51b53c333237f4d572580ac