CVE-2026-42273highCWE-178CWE-436

CVE-2026-42273: fallo de gravedad alta en dadrus heimdall

Heimdall: Case-sensitive host matching may lead to policy bypass

Publicada el

Seguir esta CVE+ Monitorear heimdall+ Monitorear github.com/dadrus/heimdall

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

21Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 7.8epss 0.3%
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.
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
Productos afectados
dadrus · heimdall
CVEs relacionadas — dadrus heimdall

En el mismo producto, de las más peligrosas a las menos.

CVE-2026-57209HIGHHeimdall: Forwarded Header Injection via Unsanitized Host Header in Proxy ModeEPSS 0.5%CVE-2026-42272HIGHHeimdall: Case-sensitive handling of URL-encoded slashes may lead to inconsistent path interpretationEPSS 0.4%CVE-2026-42274HIGHHeimdall: Authorization bypass via path normalization mismatchEPSS 0.4%CVE-2026-32811HIGHHeimdall: Path received via Envoy gRPC corrupted when containing query stringEPSS 0.3%CVE-2026-57210HIGHHeimdall: IP Spoofing via Unvalidated Forwarding HeadersEPSS 0.3%