CVE-2026-105118

MEDIUM 4.7

OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession

CVSS Score

4.7

EPSS Score

0.0%

EPSS Percentile

0th

OpenAM before 16.1.3 contains an open redirect vulnerability that allows unauthenticated attackers to redirect users by supplying an unverified id_token_hint to the /oauth2/connect/endSession endpoint. Attackers can name any realm client in a forged hint to redirect victims to any registered post-logout URI, enabling phishing that borrows the OpenAM host's trust.

CWE	CWE-347
Vendor	openidentityplatform
Product	openam
Published	Oct 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

OpenIdentityPlatform / OpenAM

0 < 16.1.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-6f8c-crwq-jqm3 vulncheck.com: https://www.vulncheck.com/advisories/openam-before-16.1.3-open-redirect-via-unverified-id-token-hint-in-endsession

Credits

🔍 rockmelodies 🔍 santhreal maximthomas tsujiguchitky