CVE-2026-51584: n/a
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.
AI Analysis
Technical Summary
The vulnerability in usememos version 0.27.1 is located in the SignIn handler's ssoCredentials branch within server/router/api/v1/auth_service.go. It allows a remote attacker to achieve account takeover by exploiting the fact that the SSO identity is matched only on an identifier that the attacker can control. The system fails to bind the SSO identity to the identity provider's stable subject claim, which is the authoritative identifier, thereby permitting unauthorized access.
Potential Impact
Successful exploitation results in remote account takeover, allowing attackers to impersonate legitimate users without proper authentication. This compromises user accounts and potentially any data or privileges associated with them within the usememos application.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should be cautious with SSO usage and monitor for updates from the vendor. No official remediation or temporary fixes are currently documented.
CVE-2026-51584: n/a
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.
CVSS v3.1
Score 9.8critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in usememos version 0.27.1 is located in the SignIn handler's ssoCredentials branch within server/router/api/v1/auth_service.go. It allows a remote attacker to achieve account takeover by exploiting the fact that the SSO identity is matched only on an identifier that the attacker can control. The system fails to bind the SSO identity to the identity provider's stable subject claim, which is the authoritative identifier, thereby permitting unauthorized access.
Potential Impact
Successful exploitation results in remote account takeover, allowing attackers to impersonate legitimate users without proper authentication. This compromises user accounts and potentially any data or privileges associated with them within the usememos application.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should be cautious with SSO usage and monitor for updates from the vendor. No official remediation or temporary fixes are currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6a7b2dc0bf8831d539d7869b
Added to database: 08/11/2026, 14:12:16 UTC
Last enriched: 08/11/2026, 16:27:56 UTC
Last updated: 09/24/2026, 01:47:42 UTC
Views: 55
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