CVE-2026-54147
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductOrg.http4k:http4k-security-digest
PublishedSep 18, 2026
First seenSep 18, 2026
Weakness typeCWE-327CWE-327
How to fix
Update
- org.http4k:http4k-security-digest6.50.0.0, 5.42.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| org.http4k:http4k-security-digestMaven | 6.0.0.0 ≤ v < 6.50.0.0, 5.0.0.0 ≤ v < 5.42.0.0, v ≤ 4.48.2.0 | 6.50.0.0, 5.42.0.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.