{"id":"CVE-2026-42273","revision":"286b5e817ee64310b87d8b33ea7c6825","records":[{"revision":"286b5e817ee64310b87d8b33ea7c6825","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-42273","aliases":[],"title":"Heimdall: Case-sensitive host matching may lead to policy bypass","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.","state":0,"publishedAt":"2026-05-08T03:42:50.312+00:00","modifiedAt":"2026-05-08T10:40:56.541+00:00","affected":[{"ecosystem":"Vendor product","name":"heimdall","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"dadrus\",\n                    \"product\": \"heimdall\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.17.14\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":7.8,"severity":"HIGH"}],"references":["https://github.com/dadrus/heimdall/security/advisories/GHSA-72h4-mxfc-jx37","https://github.com/dadrus/heimdall/pull/3208","https://github.com/dadrus/heimdall/commit/3d05e56a9e7ef0355f17482b4322054af4e85943","https://github.com/dadrus/heimdall/releases/tag/v0.17.14"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-42273","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-42273","identifiers":["CVE-2026-42273"]},"retained":false,"historicalAffected":[]}],"coverage":[]}