Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/dadrus/heimdall/commit/3d05e56a9e7ef0355f17482b4322054af4e859
- 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
FAQ
What is CVE-2026-42273?
CVE-2026-42273 is a documented vulnerability. 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...
How severe is CVE-2026-42273?
CVSS scoring is not yet available for CVE-2026-42273. Check NVD for updates.
Is there a patch for CVE-2026-42273?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.