Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/http4k/http4k/commit/4f904b4692
- https://github.com/http4k/http4k/commit/8a52b615b1
- https://github.com/http4k/http4k/security/advisories/GHSA-c7jm-38gq-h67h
- https://www.vulncheck.com/advisories/http4k-before-6.48.0.0-digest-authenticatio
FAQ
What is CVE-2026-100834?
CVE-2026-100834 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 DigestAut...
How severe is CVE-2026-100834?
CVE-2026-100834 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-100834?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.