CVE-2026-100834
http4k's Digest authentication module (org.http4k:http4k-security-digest) before versions 6.48.0.0…
- Risk score
- 40/100
- CVSS
- 5.9 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 27 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 t…
- Affected
- See advisory
- Fix
- Upgrade the product to 6.48.0.0, 5.42.0.0 or 4.51.0.0 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 5.9 medium
References
Original 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.
Last activity 27 Sep 2026. Patch Forecast updates every hour.