{"id":"CVE-2026-42273","revision":"4c26463188c54d428388d0260f464cd8","records":[{"revision":"4c26463188c54d428388d0260f464cd8","observedAt":"2026-10-27T11:12:01.124+00:00","statement":{"source":"nvd","id":"CVE-2026-42273","aliases":[],"title":"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 resul…","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":"2026-05-08T04:16:22.457+00:00","modifiedAt":"2026-10-26T20:10:00.16+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7.8,"severity":"HIGH"}],"references":["https://github.com/dadrus/heimdall/commit/3d05e56a9e7ef0355f17482b4322054af4e85943","https://github.com/dadrus/heimdall/pull/3208","https://github.com/dadrus/heimdall/releases/tag/v0.17.14","https://github.com/dadrus/heimdall/security/advisories/GHSA-72h4-mxfc-jx37"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-42273","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-178","CWE-436"],"productCriteria":[],"sourceDates":{"published":"2026-05-08T04:16:22.457","lastModified":"2026-10-26T20:10:00.160"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-42273","identifiers":["CVE-2026-42273"]},"retained":false,"historicalAffected":[]}],"coverage":[]}