CVE-2026-54147
http4k: `DigestAuthProvider.verify` ignored configured algorithm and did not bind to request URI
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
http4k is a functional toolkit for Kotlin HTTP applications. Prior to 4.51.0.0, 5.42.0.0, and 6.50.0.0, DigestAuthProvider.verify in http4k-security-digest ignores its configured algorithm parameter and verifies every Digest response with hardcoded MD5. Deployments configured for SHA-256 therefore receive weaker MD5-based verification, exposing Digest authentication to collision-related attack paths that depend on the hash function's collision resistance. This issue is fixed in versions 4.51.0.0, 5.42.0.0, and 6.50.0.0.
| CWE | CWE-327 |
| Vendor | http4k |
| Product | http4k |
| Published | Sep 18, 2026 |
| Last Updated | Sep 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None
Affected Versions
http4k / http4k
< 4.51.0.0 >= 5.0.0.0, < 5.42.0.0 >= 6.0.0.0, < 6.50.0.0