🛡️ CVE-2026-42274
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-35 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall performs rule matching on the raw (non-normalized) request path, while downstream components may normalize dot-segments according to RFC 3986, Section 6.2.2.3. This discrepancy can result in heimdall authorizing a request for one path (e.g., /user/../admin, or URL-encoded variants such as /user/%2e%2e/admin or /user/%2e%2e%2fadmin. The latter would require the allow_encoded_slashes option to be set to on or no_decode.) while the downstream ultimately processes a different, normalized path (/admin). This issue has been patched in version 0.17.14.

Details

Severity HIGH
CVSS Score 8.0
CVSS 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
CWE CWE-35
Public Exploit ✅ No
Source NVD
Published 2026-04-25
Updated 2026-06-02
Modified 2026-05-12
Fix URL N/A

Affected Packages

Software From version Fixed in
github.com/dadrus/heimdall — —
unknown — —

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