{"id":"CVE-2026-100834","revision":"5a2b53f3631d4e65a3cd0e75de9ab4bd","records":[{"revision":"5a2b53f3631d4e65a3cd0e75de9ab4bd","observedAt":"2026-10-29T22:48:55.035+00:00","statement":{"source":"cve-program","id":"CVE-2026-100834","aliases":[],"title":"http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass","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.","state":0,"publishedAt":"2026-09-27T01:28:32.781+00:00","modifiedAt":"2026-10-29T21:15:27.491+00:00","affected":[{"ecosystem":"Vendor product","name":"http4k","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"http4k\",\n                    \"product\": \"http4k\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:maven/org.http4k/http4k-security-digest\",\n                    \"versions\": [\n                        {\n                            \"version\": \"6.0.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"6.48.0.0\"\n                        },\n                        {\n                            \"version\": \"6.48.0.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"http4k","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"http4k\",\n                    \"product\": \"http4k\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:maven/org.http4k/http4k-security-digest\",\n                    \"versions\": [\n                        {\n                            \"version\": \"5.0.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"5.42.0.0\"\n                        },\n                        {\n                            \"version\": \"5.42.0.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"http4k","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"http4k\",\n                    \"product\": \"http4k\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:maven/org.http4k/http4k-security-digest\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"4.51.0.0\"\n                        },\n                        {\n                            \"version\": \"4.51.0.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.2,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/http4k/http4k/security/advisories/GHSA-c7jm-38gq-h67h","https://github.com/http4k/http4k/commit/8a52b615b1","https://github.com/http4k/http4k/commit/4f904b4692","https://www.vulncheck.com/advisories/http4k-before-6.48.0.0-digest-authentication-replay-protection-bypass"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-100834","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-100834","identifiers":["CVE-2026-100834"]},"retained":false,"historicalAffected":[]}],"coverage":[]}