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CVE-2026-54147 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:9.1 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/http4k/http4k/commit/65d23d99fc5afbe34f29d8f61d0a003fbebb381c	[email protected]	Source CodeVendor
https://github.com/http4k/http4k/releases/tag/6.50.0.0	[email protected]	Release NotesVendor
https://github.com/http4k/http4k/security/advisories/GHSA-vxxm-wwqh-mh47	[email protected]	AdvisoryRemedyVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-327	Use of a Broken or Risky Cryptographic Algorithm	[email protected]

Affected Products

Product	Versions
http4k	<= 6.49.0.0
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 6.50.0.0moderate effort Workaround:low effort Do not rely on the algorithm configuration; assume MD5 is in use and treat the Digest credentials as low-trust.
http4k-security-digest	<= 5.41.0.0 <= 4.50.0.0
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 5.42.0.0moderate effort Upgrade: 4.51.0.0moderate effort Workaround:low effort Do not rely on the algorithm configuration; assume MD5 is in use and treat the Digest credentials as low-trust.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 18, 2026	CVE Modified	CISA-ADP
Sep 18, 2026	New CVE Received	[email protected]