Description

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall handles URL-encoded slashes (%2F) in a case-sensitive manner, while percent-encoding is defined to be case-insensitive. As a result, the lowercase equivalent (%2f) is not recognized and therefore not processed as expected when allow_encoded_slashes is set to off (the default setting). This discrepancy can lead to differences in how request paths are interpreted by heimdall and upstream components, which may result in authorization bypass. This issue has been patched in version 0.17.14.

INFO

Published Date :

2026-05-08T03:40:17.541Z

Last Modified :

2026-05-08T03:40:17.541Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-42272 vulnerability.

Vendors Products
Dadrus
  • Heimdall
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-42272.

URL Resource
https://github.com/dadrus/heimdall/commit/8b0de6aba23a047cfee3081df878271bb17f4351 cve-icon cve-icon
https://github.com/dadrus/heimdall/pull/3207 cve-icon cve-icon
https://github.com/dadrus/heimdall/releases/tag/v0.17.14 cve-icon cve-icon
https://github.com/dadrus/heimdall/security/advisories/GHSA-43jv-5j4x-qv67 cve-icon cve-icon
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