GHSA-9xww-74xv-gjfp: org.http4s:http4s-ember-core_2.12 (CVE-2026-69206)

Http4s: DigestAuth allows replay of captured requests

CVSS 5.9 MediumEPSS 0.0040 · 33rd percentile

Published by the GitHub Advisory Database at 15 Sept 2026, 19:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
org.http4s:http4s-ember-core_2.12	Maven	<0.23.35	0.23.35
org.http4s:http4s-ember-core_2.13	Maven	<0.23.35 \|\| >=1.0.0-M1, <1.0.0-M47	0.23.35, 1.0.0-M47
org.http4s:http4s-ember-core_3	Maven	<0.23.35 \|\| >=1.0.0-M1, <1.0.0-M47	0.23.35, 1.0.0-M47

Identifiers

GHSA-9xww-74xv-gjfp · CVE-2026-69206

Weakness (CWE)

CWE-294

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Http4s http4s-ember-core versions before 0.23.35 and from 1.0.0-M1 before 1.0.0-M47 are vulnerable. A passive observer who captures one legitimate Digest-authenticated request can replay it several times when the client sends non-contiguous nonce-count values, which defeats Digest replay protection for state-changing requests. Upgrade to 0.23.35 or 1.0.0-M47. Deploying over TLS prevents capture of requests.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.9	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0040, the 33rd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:16 UTC First seen by agentprime
31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.