CVE-2026-100834
http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
http4k's Digest authentication module (org.http4k:http4k-security-digest) before versions 6.48.0.0, 5.42.0.0 and 4.51.0.0 defaults the nonceVerifier parameter of ServerFilters.DigestAuth and DigestAuthProvider to { true }, so every nonce is accepted regardless of its value, age, or prior use. Applications relying on this default have no replay protection on Digest authentication: an attacker who can capture a valid 'Authorization: Digest' response (for example by observing network traffic or reading logs) can replay it indefinitely against the same protected resource.
| CWE | CWE-294 |
| Vendor | http4k |
| Product | http4k |
| Published | Sep 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
http4k / http4k
0 < 6.48.0.0
http4k / http4k
0 < 5.42.0.0
http4k / http4k
0 < 4.51.0.0
References
github.com: https://github.com/http4k/http4k/security/advisories/GHSA-c7jm-38gq-h67h github.com: https://github.com/http4k/http4k/commit/8a52b615b1 github.com: https://github.com/http4k/http4k/commit/4f904b4692 vulncheck.com: https://www.vulncheck.com/advisories/http4k-before-6.48.0.0-digest-authentication-replay-protection-bypass