CVE-2026-51584 Auth bypass in n/a
Remote attackers can take over accounts in usememos by exploiting SSO identity matching flaws that rely on attacker-controlled identifiers instead of stable subject claims.
- 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-2026-51584?
CVE-2026-51584 is a critical authentication bypass vulnerability in n/a, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue in usememos v0.27.1 allows a remote attacker to achieve account takeover via the ssoCredentials branch of the SignIn handler in server/router/api/v1/auth_service.go, because SSO identity is matched only on an attacker-controllable identifier without binding to the IdP's stable subject claim.
Weakness: CWE-287
Which versions are affected by CVE-2026-51584?
How do I fix CVE-2026-51584?
No fix has been published for CVE-2026-51584 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-2026-51584 being exploited?
There is no known exploitation of CVE-2026-51584 in the wild and no public exploit code.
Sources
Also known as GHSA-wgqp-f2p3-x7mp.