{"id":"CVE-2026-53660","kind":"vulnerability","aliases":["CVE-2026-53660","GHSA-fpmh-vx4h-xc33"],"related":[],"title":"OpenAM Insecure SSO Cookie Initialization","description":"## Summary\n\n**Description**\nAn Insecure Default Initialization of Resource (CWE-1188) issue in the OpenAM default configuration ships the `iPlanetDirectoryPro` SSO cookie with `HttpOnly=false`. Also, the `iPlanetDirectoryPro` SSO cookie is used as a CSRF token in OAuth/OIDC flows. This affects OpenAM Community Edition through version 16.0.6 and was patched in version 16.1.1.\n\n## Impact\nA single click on an attacker link may yield full SSO session theft of any authenticated console user when chained with any other same-origin XSS in the OpenAM origin. The missing `SameSite` default also widens the CSRF surface. Also, because the consent flow reuses the SSO cookie as its CSRF token, any XSS in the OpenAM origin both steals the session and completes attacker-driven OAuth consent grants in one step.\n\n## Patch\nThis has been patched in OpenAM Community Edition version 16.1.1. Users are encouraged to update to the latest release.","summary":"OpenAM Community Edition ships its iPlanetDirectoryPro SSO cookie without HttpOnly by default, so any script running in the OpenAM origin can read it. Combined with an XSS flaw, an attacker can steal an authenticated console session and complete OAuth consent grants.","severity":"high","cvss":7.4,"epss":0.00409,"exploited":false,"exploited_at":null,"products":[{"name":"org.openidentityplatform.openam:openam-core","fixed":["16.1.1"],"affected":"< 16.1.1","ecosystem":"maven"}],"ecosystems":["maven"],"tags":["cwe-1004","cwe-1188","cwe-1275","java","maven","openam","package","self-hosted","sso"],"not_affected_if":["no-authenticated-console-users","version-16.1.1-or-later"],"how_to_check":"- Check the openam-core version in the Maven build file or dependency tree against `16.1.1`\n- Inspect the Set-Cookie header for `iPlanetDirectoryPro` in a login response and confirm whether `HttpOnly` is present","fix":"- Upgrade `org.openidentityplatform.openam:openam-core` to `16.1.1` or later","status":"open","published_at":"2026-08-14T19:25:57+00:00","first_seen_at":"2026-10-28T15:34:52+00:00","triaged_at":"2026-10-28T15:35:13+00:00","updated_at":"2026-10-28T16:04:30+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-28T15:35:13Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade `org.openidentityplatform.openam:openam-core` to `16.1.1` or later","reach":"internet","title":"OpenAM: default SSO cookie readable by scripts enables session theft","impact":"high","summary":"OpenAM Community Edition ships its iPlanetDirectoryPro SSO cookie without HttpOnly by default, so any script running in the OpenAM origin can read it. Combined with an XSS flaw, an attacker can steal an authenticated console session and complete OAuth consent grants.","category":"package","nicknames":[],"who_cares":["openam","self-hosted","sso","java","maven"],"confidence":0.8,"needs_auth":"unknown","worst_case":"attacker steals admin SSO session via script and cookie","analyst_note":"","how_to_check":"- Check the openam-core version in the Maven build file or dependency tree against `16.1.1`\n- Inspect the Set-Cookie header for `iPlanetDirectoryPro` in a login response and confirm whether `HttpOnly` is present","needs_analyst":false,"not_affected_if":["version-16.1.1-or-later","no-authenticated-console-users"],"who_is_affected":"Teams running OpenAM Community Edition 16.0.6 or earlier with the default cookie configuration, where the console or SSO origin is reachable by users. The exposure is greatest where any same-origin XSS exists in the OpenAM origin. Deployments already on 16.1.1 or later are not affected.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000638,"input_tokens":3625,"output_tokens":550,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-1004':22B '-1188':24B,85C '-1275':26B '-2026':7A,15A '-53660':8A,16A '16.0.6':121C '16.1.1':127C,213C 'affect':115C 'also':100C,164C,169C 'attack':64B,134C,195C 'attacker-driven':194C 'authent':68B,144C 'chain':148C 'click':131C 'combin':58B 'communiti':36B,117C,210C 'complet':72B,193C 'configur':91C 'consent':74B,172C,198C 'consol':69B,145C 'cooki':4A,42B,96C,104C,177C 'core':20A 'csrf':109C,167C,180C 'cve':6A,14A 'cwe':21B,23B,25B,84C 'default':46B,80C,90C,163C 'descript':77C 'driven':196C 'edit':37B,118C,211C 'encourag':216C 'fals':99C 'flaw':62B 'flow':113C,173C 'fpmh':11A 'full':138C 'ghsa':10A 'ghsa-fpmh-vx4h-xc33':9A 'grant':75B,199C 'host':33B 'httpon':44B,98C 'impact':128C 'initi':5A,81C 'insecur':2A,79C 'iplanetdirectorypro':40B,94C,102C 'issu':86C 'java':27B 'latest':221C 'link':135C 'maven':28B 'may':136C 'miss':161C 'oauth':73B,197C 'oauth/oidc':112C 'one':201C 'openam':1A,19A,29B,35B,53B,89C,116C,158C,186C,209C 'openam-core':18A 'org.openidentityplatform.openam':17A 'origin':54B,154C,159C,187C 'packag':30B 'patch':124C,203C,207C 'read':56B 'releas':222C 'resourc':83C 'reus':174C 'run':50B 'same-origin':152C 'samesit':162C 'script':49B 'self':32B 'self-host':31B 'session':70B,140C,191C 'ship':38B,92C 'singl':130C 'sso':3A,34B,41B,95C,103C,139C,176C 'steal':66B,189C 'step':202C 'summari':76C 'surfac':168C 'theft':141C 'token':110C,181C 'updat':218C 'use':106C 'user':146C,214C 'version':120C,126C,212C 'vx4h':12A 'widen':165C 'without':43B 'xc33':13A 'xss':61B,155C,183C 'yield':137C","nicknames":[],"mitigations":[],"who_affected":"Teams running OpenAM Community Edition 16.0.6 or earlier with the default cookie configuration, where the console or SSO origin is reachable by users. The exposure is greatest where any same-origin XSS exists in the OpenAM origin. Deployments already on 16.1.1 or later are not affected.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-08-14T19:25:57+00:00","kev":null,"cvss_vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"security-advisories@github.com","poc_count":0,"sources":[{"source":"ghsa","external_id":"GHSA-fpmh-vx4h-xc33","url":"https://github.com/advisories/GHSA-fpmh-vx4h-xc33","severity":"high","published_at":"2026-08-14T19:25:57+00:00","modified_at":"2026-10-28T15:30:02+00:00","first_seen_at":"2026-10-28T15:34:52+00:00","fetched_at":"2026-10-28T15:34:52+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-53660","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53660","severity":null,"published_at":"2026-09-15T10:17:05+00:00","modified_at":"2026-09-23T18:21:42+00:00","first_seen_at":"2026-10-28T16:04:30+00:00","fetched_at":"2026-10-28T16:04:30+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}