CVE-2026-54147 json
http4k: `DigestAuthProvider.verify` ignored configured algorithm and did not bind to request URI
published 2026-08-17 2 mo ago modified 2026-09-24 45 d ago also GHSA-vxxm-wwqh-mh47 , EUVD-2026-83042
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 17%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- maven org.http4k:http4k-security-digest 5.42.0.0, 6.50.0.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 51 d ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.http4k:http4k-security-digest | >=6.0.0.0, <6.50.0.0 >=5.0.0.0, <5.42.0.0 <=4.48.2.0 |
6.50.0.0 5.42.0.0 |
Affected products
- http4k http4k
Classification
- Weakness
-
- CWE-327 Use of a Broken or Risky Cryptographic Algorithm
References
Sources
- CVE List CVE-2026-54147
- GitHub Advisory GHSA-vxxm-wwqh-mh47
- NVD CVE-2026-54147
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