What is CVE-2026-85511?

CVE-2026-85511 is a medium-severity vulnerability in Red Hat Jboss Enterprise Application Platform 8, classified under Authentication Bypass by Spoofing. CVSS score: 4.2/10. Published 2026-09-18.

How severe is CVE-2026-85511?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Vulnerability in Red Hat Jboss Enterprise Application Platform 8

CVE-2026-85511

A flaw was found in EAP's Elytron. An EAP application whose security domain is backed by an Elytron token-realm with oauth2-introspection would allow parameter substitution due to missing URL encoding.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Red Hat Jboss Enterprise Application Platform 8

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-85511?: CVE-2026-85511 is a medium-severity vulnerability in Red Hat Jboss Enterprise Application Platform 8, classified under Authentication Bypass by Spoofing. CVSS score: 4.2/10. Published 2026-09-18.
How severe is CVE-2026-85511?: Medium severity. CVSS v3 base score is 4.2 out of 10.