CVE-2026-23837 MyTube has an Authorization Bypass vulnerability
Unauthenticated attackers can bypass authentication checks to access and modify application settings and passwords in MyTube instances with login enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-23837?
CVE-2026-23837 is a critical authentication bypass vulnerability in franklioxygen MyTube, published on 19 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
MyTube is a self-hosted downloader and player for several video websites. A vulnerability present in version 1.7.65 and poetntially earlier versions allows unauthenticated users to bypass the mandatory authentication check in the roleBasedAuthMiddleware. By simply not providing an authentication cookie (making req.user undefined), a request is incorrectly passed through to downstream handlers. All users running MyTube with loginEnabled: true are impacted. This flaw allows an attacker to access and modify application settings via /api/settings, change administrative and visitor passwords, and access other protected routes that rely on this specific middleware. The problem is patched in v1.7.66. MyTube maintainers recommend all users upgrade to at least version v1.7.64 immediately to secure their instances. The fix ensures that the middleware explicitly blocks requests if a user is not authenticated, rather than defaulting to next(). Those who cannot upgrade immediately can mitigate risk by restricting network access by usi a firewall or reverse proxy (like Nginx) to restrict access to the /api/ endpoints to trusted IP addresses only or, if they are comfortable editing the source code, manually patch by locating roleBasedAuthMiddleware and ensuring that the logic defaults to an error (401 Unauthorized) when req.user is undefined, instead of calling next().
Weakness: CWE-863
Which versions are affected by CVE-2026-23837?
It affects 1 product.
Products include Franklioxygen Mytube.
How do I fix CVE-2026-23837?
No fix has been published for CVE-2026-23837 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-23837 being exploited?
There is no known exploitation of CVE-2026-23837 in the wild and no public exploit code.
Other vulnerabilities in franklioxygen MyTube
- CVE-2026-33890 MyTube has an Unauthenticated Admin Privilege Escalation via Passkey Registration
- CVE-2026-24139 MyTube Allows Unauthorized Database Export by Guest Users
- 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
- CVE-2026-23848 MyTube has Rate Limiting Bypass via X-Forwarded-For Header Spoofing
Sources
Also known as GHSA-cmvj-g69f-8664.