An issue in usememos v0.27.1 allows a remote attacker to achieve account takeover via the ssoCredentials branch of the SignIn handler in… (CVE-2026-51584)
usememos v0.27.1 contains a vulnerability in its SignIn handler that allows a remote attacker to take over user accounts. The issue arises because the SSO identity verification relies solely on an attacker-controllable identifier without properly binding to the identity provider's stable subject claim. This flaw enables unauthorized account access via the ssoCredentials branch of the authentication process.
AI Analysis
Technical Summary
In usememos version 0.27.1, the SignIn handler's ssoCredentials branch improperly validates SSO identities by matching only an attacker-controllable identifier rather than binding to the identity provider's stable subject claim. This design flaw allows a remote attacker to bypass proper identity verification and achieve account takeover.
Potential Impact
An attacker can remotely take over user accounts by exploiting the flawed SSO identity verification mechanism. This compromises user account integrity and potentially allows unauthorized access to sensitive data or functionality within the affected application.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid using the affected SSO authentication mechanism or restrict access to trusted users only.
An issue in usememos v0.27.1 allows a remote attacker to achieve account takeover via the ssoCredentials branch of the SignIn handler in… (CVE-2026-51584)
Description
usememos v0.27.1 contains a vulnerability in its SignIn handler that allows a remote attacker to take over user accounts. The issue arises because the SSO identity verification relies solely on an attacker-controllable identifier without properly binding to the identity provider's stable subject claim. This flaw enables unauthorized account access via the ssoCredentials branch of the authentication process.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In usememos version 0.27.1, the SignIn handler's ssoCredentials branch improperly validates SSO identities by matching only an attacker-controllable identifier rather than binding to the identity provider's stable subject claim. This design flaw allows a remote attacker to bypass proper identity verification and achieve account takeover.
Potential Impact
An attacker can remotely take over user accounts by exploiting the flawed SSO identity verification mechanism. This compromises user account integrity and potentially allows unauthorized access to sensitive data or functionality within the affected application.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid using the affected SSO authentication mechanism or restrict access to trusted users only.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-wgqp-f2p3-x7mp
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-51584"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a7b6fcabf8831d5393e9c1a
Added to database: 08/11/2026, 18:54:02 UTC
Last enriched: 08/11/2026, 18:58:41 UTC
Last updated: 08/12/2026, 02:40:59 UTC
Views: 5
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