Medium severity6.5NVD Advisory· Published Sep 18, 2026· Updated Sep 24, 2026
CVE-2026-54147
CVE-2026-54147
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.http4k:http4k-security-digestMaven | >= 6.0.0.0, < 6.50.0.0 | 6.50.0.0 |
org.http4k:http4k-security-digestMaven | >= 5.0.0.0, < 5.42.0.0 | 5.42.0.0 |
org.http4k:http4k-security-digestMaven | <= 4.48.2.0 | — |
Affected products
2Patches
Vulnerability mechanics
References
5News mentions
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