CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-69208
High (7.5). EPSS 0.8% chance of exploitation in the next 30 days. Fixed in org.http4s:http4s-ember-server_2.12 0.23.35.
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, the DigestAuth server middleware removes fresh nonces and stops eviction at the first stale nonce because its stale-nonce comparison is inverted. On an application that protects at least one route with DigestAuth, an unauthenticated attacker can repeatedly trigger authentication challenges, causing the persistent nonce map to grow until the JVM exhausts heap memory. This issue is fixed in versions 0.23.35 and 1.0.0-M47.
Severity
- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-400, CWE-401
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-fm4g-76c9-7w69 | Maven | org.http4s:http4s-ember-server_2.12 | <0.23.35 | 0.23.35 |
| GHSA-fm4g-76c9-7w69 | Maven | org.http4s:http4s-ember-server_2.13 | <0.23.35 | 0.23.35 |
| GHSA-fm4g-76c9-7w69 | Maven | org.http4s:http4s-ember-server_3 | <0.23.35 | 0.23.35 |
| GHSA-fm4g-76c9-7w69 | Maven | org.http4s:http4s-ember-server_2.13 | >=1.0.0-M1 <1.0.0-M47 | 1.0.0-M47 |
| GHSA-fm4g-76c9-7w69 | Maven | org.http4s:http4s-ember-server_3 | >=1.0.0-M1 <1.0.0-M47 | 1.0.0-M47 |