Vulnerability in Red Hat Jboss Enterprise Application Platform 7
CVE-2026-15556
A flaw was found in Picketlink's SP signature validation; a SAML response containing zero assertion elements matching the signature check can allow an attacker to forge a SAML response and auth as any principal with any roles on the protected application.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (13.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Red Hat Jboss Enterprise Application Platform 7
- Red Hat Jboss Enterprise Application Platform 7.4.25
- Red Hat Jboss Enterprise Application Platform 7.4 Els On Rhel 7 — versions 0:2.16.0-22.redhat_00057.1.el7eap, 0:2.3.14-11.SP11_redhat_00001.1.el7eap, 0:1.5.26-2.Final_redhat_00001.1.el7eap
- Red Hat Jboss Enterprise Application Platform 8
- Red Hat Jboss Enterprise Application Platform Expansion Pack
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-15556 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:53644 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53806 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53645 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53646 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-15556?
- CVE-2026-15556 is a high-severity vulnerability in Red Hat Jboss Enterprise Application Platform 7, classified under Improper Verification of Cryptographic Signature. CVSS score: 8.1/10. Published 2026-08-11.
- How severe is CVE-2026-15556?
- High severity. CVSS v3 base score is 8.1 out of 10.