CVE-2026-105118 PUBLISHED

OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession

Assigner: VulnCheck
Reserved: 03.10.2026 Published: 03.10.2026 Updated: 03.10.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
CVSS Score: 2.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	Low
Attack Complexity	High	Integrity	Low	Integrity	Low
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS Score: 4.7

Attack Vector	Network	Scope	Changed
Attack Complexity	High	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	OpenIdentityPlatform
Product	OpenAM
Versions	Default: unaffected affected from 0 to 16.1.3 (excl.) Version 16.1.3 is unaffected

CVE-2026-105118 PUBLISHED

OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession

Metrics

Product Status

Credits

References

Problem Types