CVE-2026-33890

Name: CVE-2026-33890
Creator: NVD / NIST
Published: 2026-03-27T01:16:21.493+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.9/10EPSS 0.49%

Last modified Jun 17, 2026

CVE-2026-33890 is a high-severity vulnerability rated 8.9/10 on the CVSS scale. 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. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

8.9/10

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.49%

38.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Franklioxygen	Mytube	< 1.8.71

References

https://github.com/franklioxygen/MyTube/commit/d6c1275a7ff7ffd3d51b53c333237f4d572580acPatch
https://github.com/franklioxygen/MyTube/security/advisories/GHSA-378w-xh68-qrc8Exploit, Vendor Advisory
https://github.com/franklioxygen/MyTube/security/advisories/GHSA-378w-xh68-qrc8Exploit, Vendor Advisory

Timeline

Published: Mar 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-33890?

How severe is CVE-2026-33890?

CVE-2026-33890 has a CVSS score of 8.9/10 (HIGH severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.

How do I fix CVE-2026-33890?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-33890?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST