{"id":"CVE-2026-100834","published":"2026-09-27T02:17:21.487","lastModified":"2026-09-27T02:17:21.487","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.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cwes":["CWE-294"],"vendors":[],"products":[],"references":[{"url":"https://github.com/http4k/http4k/commit/4f904b4692","tags":[]},{"url":"https://github.com/http4k/http4k/commit/8a52b615b1","tags":[]},{"url":"https://github.com/http4k/http4k/security/advisories/GHSA-c7jm-38gq-h67h","tags":[]},{"url":"https://www.vulncheck.com/advisories/http4k-before-6.48.0.0-digest-authentication-replay-protection-bypass","tags":[]}],"exploitRefs":[{"url":"https://github.com/http4k/http4k/commit/4f904b4692","tags":[]},{"url":"https://github.com/http4k/http4k/commit/8a52b615b1","tags":[]},{"url":"https://github.com/http4k/http4k/security/advisories/GHSA-c7jm-38gq-h67h","tags":[]}],"hasPoc":true,"ai":null}