CVEvulnerability
CVE-2026-69206
5.9 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-09-15
- Last modified
- 2026-09-16
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-294
Description
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.
Related
Weakness · CWE (1)
- CWE-294 Authentication Bypass by Capture-replay weakness
References
- https://github.com/http4s/http4s/commit/7f065101c45f3d86bc105e8fc6323c2c4a11471f github.com
- https://github.com/http4s/http4s/releases/tag/v0.23.35 github.com
- https://github.com/http4s/http4s/releases/tag/v1.0.0-M47 github.com
- https://github.com/http4s/http4s/security/advisories/GHSA-9xww-74xv-gjfp github.com