{"affected":[{"defaultStatus":"unaffected","ecosystem":"maven","packageName":"org.openidentityplatform.openam/openam-federation-library","product":"OpenAM","source":"CNA: VulnCheck","vendor":"OpenIdentityPlatform","versions":[{"lessThan":"16.1.4","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"16.1.4","versionType":"semver"}]}],"cveId":"CVE-2026-123540","cwes":["CWE-116"],"description":"OpenAM before 16.1.4 contains an incomplete output encoding vulnerability that allows a SAML 1.x identity provider to alter attribute values by injecting unencoded content into the service provider auto-submitted form. Attackers controlling a trusted identity provider can craft assertion attribute names or values that reach the target application in modified form, undermining the integrity of received attributes.","epss":{"date":"2026-11-10","percentile":0.08082,"score":0.00184},"exploits":[],"kev":null,"metrics":[{"score":2,"severity":"low","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":2,"severity":"low","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},{"score":2,"severity":"low","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:N/VI:L/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","version":"4.0"},{"score":2,"severity":"low","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N","version":"3.1"}],"modifiedAt":1794487926326,"publishedAt":1794101866615,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-pw99-8h4m-p3gm"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openam-before-16.1.4-incomplete-attribute-encoding-in-saml-1-x-form-post"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-pw99-8h4m-p3gm"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openam-before-16.1.4-incomplete-attribute-encoding-in-saml-1-x-form-post"}],"remediation":[],"revision":"dcd85c56976f19b009866aec366e58b7c535b7d636c61082f815eb7e334229f4","sources":[{"modifiedAt":1794487926326,"name":"CNA: VulnCheck","retrievedAt":1794488926732,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123540"},{"modifiedAt":1794348809767,"name":"NVD","retrievedAt":1794356337131,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123540"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794377573958,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123540"}],"ssvc":{"assessedAt":1794487877655,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpenAM before 16.1.4 Incomplete Attribute Encoding in SAML 1.x Form POST","updatedAt":1794488926732}