CVE-2026-15554CWE-295

CVE-2026-15554

High · published August 11, 2026

CVSS v3.1
7.4
EPSS
0%
Percentile
27.8
In the wild
Unconfirmed
What it is

the Undertow AJP listener honours forged ssl_cert and is_ssl AJP attributes without requiring any shared-secret authentication. This enables an unauthenticated attacker with direct TCP access to port 8009 to bypass CLIENT-CERT authentication by injecting a forged X.509 certificate via the AJP protocol.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00353 · 27.8th percentile
Weakness
CWE-295 · Improper Certificate Validation
Published
2026-08-11T13:17Z
References (10)
https://access.redhat.com/errata/RHSA-2026:53644 · [email protected]https://access.redhat.com/errata/RHSA-2026:53645 · [email protected]https://access.redhat.com/errata/RHSA-2026:53646 · [email protected]https://access.redhat.com/errata/RHSA-2026:53806 · [email protected]https://access.redhat.com/errata/RHSA-2026:70228 · [email protected]https://access.redhat.com/errata/RHSA-2026:70229 · [email protected]https://access.redhat.com/errata/RHSA-2026:70230 · [email protected]https://access.redhat.com/errata/RHSA-2026:70277 · [email protected]https://access.redhat.com/security/cve/CVE-2026-15554 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2480601 · [email protected]
EPSS history
Timeline
  • 11 AUG 08:49Z
    Undertow-core: undertow: authentication bypass via ajp ssl_cert/is_ssl forgery
    cvelistv5