CVE-2026-100834 (GCVE-0-2026-100834)
Vulnerability from cvelistv5 – Published: 2026-09-27 01:28 – Updated: 2026-09-30 17:03
VLAI
EPSS
VEX
Title
http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 17:03 UTC
CWE
- CWE-294 - Authentication Bypass by Capture-replay
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/http4k/http4k/security/advisor… | vendor-advisory |
| https://github.com/http4k/http4k/commit/8a52b615b1 | patch |
| https://github.com/http4k/http4k/commit/4f904b4692 | patch |
| https://www.vulncheck.com/advisories/http4k-befor… | third-party-advisory |
Impacted products
3 products
Date Public
2026-06-16 00:00
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