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CVE-2026-100834GHSA-C7JM-38GQ-H67H

http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.48.0.0, 5.42.0.0, 4.51.0.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • http4k http4k

    From 6.0.0.0 · fixed in 6.48.0.0

  • http4k http4k

    From 5.0.0.0 · fixed in 5.42.0.0

  • http4k http4k

    fixed in 4.51.0.0

  • org.http4k:http4k-security-digestMaven

    From 6.0.0.0 · fixed in 6.48.0.0

  • org.http4k:http4k-security-digestMaven

    From 5.0.0.0 · fixed in 5.42.0.0

  • org.http4k:http4k-security-digestMaven

    fixed in 4.51.0.0

References 4

GitHub · http4k/http4k

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