CVE-2026-15554

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:53644
https://access.redhat.com/errata/RHSA-2026:53806
https://access.redhat.com/security/cve/CVE-2026-15554
https://bugzilla.redhat.com/show_bug.cgi?id=2480601

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-11 09:17

Updated : 2026-08-24 12:16

NVD link : CVE-2026-15554

Mitre link : CVE-2026-15554

CVE.ORG link : CVE-2026-15554

JSON object : View

Products Affected

No product.

CWE

CWE-295

Improper Certificate Validation

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"https://access.redhat.com/errata/RHSA-2026:53644", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:53806", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-15554", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480601", "source": "secalert@redhat.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-295"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-08-24T12:16:48.230", "sourceIdentifier": "secalert@redhat.com"}