{"id":"CVE-2026-100834","state":"PUBLISHED","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.","publishedAt":"2026-09-27T01:28:32.781Z","updatedAt":"2026-10-29T21:15:27.491Z","severity":{"score":8.2,"label":"High","version":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["http4k http4k"],"affected":[{"vendor":"http4k","product":"http4k","packageURL":"pkg:maven/org.http4k/http4k-security-digest","defaultStatus":"unaffected","versions":[{"version":"6.0.0.0","status":"affected","lessThan":"6.48.0.0","versionType":"custom"},{"version":"6.48.0.0","status":"unaffected","versionType":"custom"}]},{"vendor":"http4k","product":"http4k","packageURL":"pkg:maven/org.http4k/http4k-security-digest","defaultStatus":"unaffected","versions":[{"version":"5.0.0.0","status":"affected","lessThan":"5.42.0.0","versionType":"custom"},{"version":"5.42.0.0","status":"unaffected","versionType":"custom"}]},{"vendor":"http4k","product":"http4k","packageURL":"pkg:maven/org.http4k/http4k-security-digest","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.51.0.0","versionType":"custom"},{"version":"4.51.0.0","status":"unaffected","versionType":"custom"}]}],"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"],"weaknesses":["CWE-294"],"ingestedAt":"2026-10-29T23:08:31.977Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/100xxx/CVE-2026-100834.json","commit":"dc7676b3f67d6707e4927968546e7e0125ff7ec7","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-100834","state":"PUBLISHED","datePublished":"2026-09-27T01:28:32.781Z","dateUpdated":"2026-10-29T21:15:27.491Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-26T23:23:03.410Z"},"containers":{"cna":{"title":"http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"http4k","product":"http4k","packageURL":"pkg:maven/org.http4k/http4k-security-digest","defaultStatus":"unaffected","versions":[{"version":"6.0.0.0","status":"affected","lessThan":"6.48.0.0","versionType":"custom"},{"version":"6.48.0.0","status":"unaffected","versionType":"custom"}]},{"vendor":"http4k","product":"http4k","packageURL":"pkg:maven/org.http4k/http4k-security-digest","defaultStatus":"unaffected","versions":[{"version":"5.0.0.0","status":"affected","lessThan":"5.42.0.0","versionType":"custom"},{"version":"5.42.0.0","status":"unaffected","versionType":"custom"}]},{"vendor":"http4k","product":"http4k","packageURL":"pkg:maven/org.http4k/http4k-security-digest","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.51.0.0","versionType":"custom"},{"version":"4.51.0.0","status":"unaffected","versionType":"custom"}]}],"references":[{"url":"https://github.com/http4k/http4k/security/advisories/GHSA-c7jm-38gq-h67h","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-c7jm-38gq-h67h)"},{"url":"https://github.com/http4k/http4k/commit/8a52b615b1","tags":["patch"],"name":"Patch Commit"},{"url":"https://github.com/http4k/http4k/commit/4f904b4692","tags":["patch"],"name":"Patch Commit"},{"url":"https://www.vulncheck.com/advisories/http4k-before-6.48.0.0-digest-authentication-replay-protection-bypass","name":"VulnCheck Advisory: http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass","tags":["third-party-advisory"]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","exploitMaturity":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS"},{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-294","lang":"en","description":"Authentication Bypass by Capture-replay","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-29T21:15:27.491Z"},"datePublic":"2026-06-16T00:00:00.000Z","x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T17:03:50.406355Z","id":"CVE-2026-100834","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T17:03:58.285Z"}}]}}}