Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall performs host matching in a case-sensitive manner, while HTTP hostnames are case-insensitive. This discrepancy can result in heimdall failing to match a rule for a request host that differs only in letter casing, potentially causing the request to be classified differently than intended. This issue has been patched in version 0.17.14.
History

Fri, 08 May 2026 11:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 08 May 2026 05:45:00 +0000

Type Values Removed Values Added
First Time appeared Dadrus
Dadrus heimdall
Vendors & Products Dadrus
Dadrus heimdall

Fri, 08 May 2026 04:00:00 +0000

Type Values Removed Values Added
Description Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall performs host matching in a case-sensitive manner, while HTTP hostnames are case-insensitive. This discrepancy can result in heimdall failing to match a rule for a request host that differs only in letter casing, potentially causing the request to be classified differently than intended. This issue has been patched in version 0.17.14.
Title Heimdall: Case-sensitive host matching may lead to policy bypass
Weaknesses CWE-178
CWE-436
References
Metrics cvssV4_0

{'score': 7.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-05-08T03:42:50.312Z

Updated: 2026-05-08T10:40:56.541Z

Reserved: 2026-04-26T11:53:27.707Z

Link: CVE-2026-42273

cve-icon Vulnrichment

Updated: 2026-05-08T10:40:48.995Z

cve-icon NVD

Status : Deferred

Published: 2026-05-08T04:16:22.457

Modified: 2026-05-08T16:03:26.693

Link: CVE-2026-42273

cve-icon Redhat

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