CVE-2026-100834: http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass
Vendor fix available · Affected: http4k · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 25% of scored CVEs
DescriptionCVE.org
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.
Affected products3
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- http4k · http4kfrom 6.0.0.0 before 6.48.0.0
- http4k · http4kfrom 5.0.0.0 before 5.42.0.0
- http4k · http4kbefore 4.51.0.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- http4k
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-100834 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.