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Advisory record · GHSA-fpmh-vx4h-xc33

OpenAM Insecure SSO Cookie Initialization

CVSS 7.4 HighEPSS 0.0041 · 35th percentile

Published by the GitHub Advisory Database at 14 Aug 2026, 19:25 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.openidentityplatform.openam:openam-coreMaven<16.1.116.1.1
Identifiers
GHSA-fpmh-vx4h-xc33 · CVE-2026-53660
Weakness (CWE)
CWE-1004 · CWE-1188 · CWE-1275
Tags
Published
14 Aug 2026
Updated
28 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The openam-core Maven package, versions before 16.1.1, ships the iPlanetDirectoryPro SSO cookie without the HttpOnly flag by default. An attacker who can run cross-site scripting in the OpenAM origin, typically by getting a user to click a crafted link, could steal the session cookie and complete OAuth consent grants. Upgrade to version 16.1.1, which fixes the issue.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.4 High 4.0 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0041, the 35th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.