CVE-2026-54147http4k: `DigestAuthProvider.verify` ignored configured algorithm and did not bind to request URI
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
- Weakness (CWE)
- CWE-327
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
http4k http4k http4k:http4k (from the name) | before 4.51.0.0; from 5.0.0.0, < 5.42.0.0; from 6.0.0.0, < 6.50.0.0 | CNA record |
References
- https://github.com/http4k/http4k/security/advisories/GHSA-vxxm-wwqh-mh47x-refsource-confirm
- https://github.com/http4k/http4k/commit/65d23d99fc5afbe34f29d8f61d0a003fbebb381cx-refsource-misc
- https://github.com/http4k/http4k/releases/tag/6.50.0.0x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.