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CVE-2026-33890— MyTube has an Unauthenticated Admin Privilege Escalation via Passkey Registration

Quick assessment

Affected
franklioxygen MyTube
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MyTube是Peifan Li个人开发者的一个视频自托管下载器和播放器。 MyTube 1.8.71之前版本存在安全漏洞，该漏洞源于未经验证的攻击者可以注册任意通行密钥并随后使用其进行身份验证以获得完整的管理员会话，可能导致应用程序完全被攻陷。

AI Predicted 9.8 Difficulty: Easy EPSS 0.70% · P52

Possible ATT&CK Techniques 1 AI

T1136.001 · Local Account
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I. Basic Information for CVE-2026-33890

Vulnerability Information
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Vulnerability Title
MyTube has an Unauthenticated Admin Privilege Escalation via Passkey Registration
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
MyTube 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MyTube是Peifan Li个人开发者的一个视频自托管下载器和播放器。 MyTube 1.8.71之前版本存在安全漏洞，该漏洞源于未经验证的攻击者可以注册任意通行密钥并随后使用其进行身份验证以获得完整的管理员会话，可能导致应用程序完全被攻陷。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
franklioxygen MyTube < 1.8.71 -

II. Public POCs for CVE-2026-33890

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III. Intelligence Information for CVE-2026-33890

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Patches & Fixes for CVE-2026-33890 (1)

Vendor Advisories for CVE-2026-33890 (1)

Same Patch Batch · franklioxygen · 2026-03-27 · 3 CVEs total

CVE-2026-33935 MyTube has Unauthenticated Account Lockout via Shared Login Attempt State
CVE-2026-33735 MyTube has an Improper Access Control that Allows Complete Application Takeover

IV. Related Vulnerabilities

Same product: MyTube
Same vendor: franklioxygen
Same weakness: CWE-284

V. Comments for CVE-2026-33890

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