Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/http4k/http4k/commit/65d23d99fc5afbe34f29d8f61d0a003fbebb381c
- https://github.com/http4k/http4k/releases/tag/6.50.0.0
- https://github.com/http4k/http4k/security/advisories/GHSA-vxxm-wwqh-mh47
FAQ
What is CVE-2026-54147?
CVE-2026-54147 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 a...
How severe is CVE-2026-54147?
CVE-2026-54147 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54147?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.