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.
Published: 2026-08-11
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 13 Aug 2026 05:45:00 +0000

Type Values Removed Values Added
Title SSO Authentication Bypass Allows Account Takeover in UseMemos 0.27.1

Thu, 13 Aug 2026 03:45:00 +0000

Type Values Removed Values Added
Title SSO Account Takeover via Unbound Identifier in usememos SignIn Handler
Weaknesses CWE-285
CWE-306

Wed, 12 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-287
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 12 Aug 2026 00:30:00 +0000

Type Values Removed Values Added
Title SSO Account Takeover via Unbound Identifier in usememos SignIn Handler
Weaknesses CWE-285
CWE-306

Wed, 12 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
First Time appeared Usememos
Usememos memos
Vendors & Products Usememos
Usememos memos

Tue, 11 Aug 2026 14:15:00 +0000

Type Values Removed Values Added
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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-12T18:23:20.839Z

Reserved: 2026-06-08T00:00:00.000Z

Link: CVE-2026-51584

cve-icon Vulnrichment

Updated: 2026-08-12T18:22:27.647Z

cve-icon NVD

Status : Received

Published: 2026-08-11T14:17:14.463

Modified: 2026-08-12T19:17:35.150

Link: CVE-2026-51584

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-13T05:30:14Z

Weaknesses