CVE-2026-69206 (GCVE-0-2026-69206)
Vulnerability from cvelistv5
Published
2026-09-15 19:29
Modified
2026-09-16 17:45
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-294 - Authentication Bypass by Capture-replay
Summary
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, DigestAuth replay protection records lastNc plus one instead of the highest nonce-count value it has accepted. When a legitimate client sends noncontiguous nc values because of parallel or retried requests, the stored counter remains below the accepted maximum, allowing a passive observer to replay a captured Authorization header multiple times. Successful replays execute authenticated requests, including state-changing operations, as the captured user. This issue is fixed in versions 0.23.35 and 1.0.0-M47.
References
Impacted products
Vendor Product Version
http4s http4s Version: < 0.23.35
Version: >= 1.0.0-M1, < 1.0.0-M47
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