High severity · published Sep 15, 2026
CVE-2026-53660
OpenAM Insecure SSO Cookie Initialization
7.4
CVSS
0.4%
EPSS
No
On KEV
Description
Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, the default configuration initializes the iPlanetDirectoryPro SSO cookie with HttpOnly disabled and without a protective SameSite default, and OAuth and OpenID Connect consent flows reuse that cookie through CsrfProtection as a CSRF token. When combined with same-origin cross-site scripting and a user following an attacker-controlled link, the cookie can be read and reused to steal the SSO session and complete attacker-driven consent grants. This issue is fixed in version 16.1.1.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenAM · OpenIdentityPlatform
< 16.1.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53660
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53660
github.com
https://github.com/OpenIdentityPlatform/OpenAM/commit/2af597267e6eb9302f75445c2c726f9b84f62966
github.com
https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1
github.com
https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fpmh-vx4h-xc33
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