What’s Vulnerable › Vulnerabilities

CVE-2026-53660: OpenAM Insecure SSO Cookie Initialization

• Severity: high (CVSS 7.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-15 · updated 2026-09-23
• Weakness: CWE-1004

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.

Affected products

• OpenIdentityPlatform OpenAM: before 16.1.1

References

• https://github.com/OpenIdentityPlatform/OpenAM/commit/2af597267e6eb9302f75445c2c726f9b84f62966
• https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1
• https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fpmh-vx4h-xc33

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