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.
History

Wed, 30 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 27 Sep 2026 05:15:00 +0000

Type Values Removed Values Added
First Time appeared Http4k
Http4k http4k
Vendors & Products Http4k
Http4k http4k

Sun, 27 Sep 2026 02:00:00 +0000

Type Values Removed Values Added
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.
Title http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass
Weaknesses CWE-294
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.2, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-27T01:28:32.781Z

Updated: 2026-10-29T21:15:27.491Z

Reserved: 2026-09-26T23:23:03.410Z

Link: CVE-2026-100834

cve-icon Vulnrichment

Updated: 2026-09-30T17:03:54.748Z

cve-icon NVD

Status : Deferred

Published: 2026-09-27T02:17:21.487

Modified: 2026-10-29T21:17:07.120

Link: CVE-2026-100834

cve-icon Redhat

No data.