cve.bz

CVE-2026-42273

7.8 highEPSS 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
7.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
EPSS
0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-26)
CWEs
CWE-178, CWE-436
Published
Modified
Record from
the NVD, synced

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-72h4-mxfc-jx37Gogithub.com/dadrus/heimdall<0.17.140.17.14
GO-2026-5200Gogithub.com/dadrus/heimdall<0.17.140.17.14

References

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