What’s Vulnerable › Vulnerabilities

CVE-2026-105118: OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-03 · updated 2026-10-06
• Weakness: CWE-347

Description

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.

Affected products

• OpenIdentityPlatform OpenAM: before 16.1.3 — fixed in 16.1.3

How to fix

Upgrade to a fixed version: OpenIdentityPlatform OpenAM 16.1.3. Check the vendor advisory for mitigations.

References

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

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