CVE-2026-105118

OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession

MEDIUM
4.7
CVSS Score
Published: October 3, 2026 at 12:14 PM UTC
Updated: October 6, 2026 at 03:18 PM UTC
1 product affected across 1 vendorOpenAM

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Severity
MEDIUM4.7
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 16.1.3
Vendor states this is fixed in 16.1.3 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.7MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-347

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