https://db.gcve.eu/rss/recent/all/10 Most recent entries from all 2026-09-29T20:38:27.230988+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent entries. https://db.gcve.eu/vuln/fkie_cve-2026-69208 fkie_cve-2026-69208 2026-09-29T20:38:27.264706+00:00

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.

 https://db.gcve.eu/vuln/ghsa-fm4g-76c9-7w69 GHSA-fm4g-76c9-7w69 — Http4s: DigestAuth nonce map grows unbounded 2026-09-29T20:38:27.264813+00:00

Affected: Maven: org.http4s:http4s-ember-server_2.12, Maven: org.http4s:http4s-ember-server_2.13, Maven: org.http4s:http4s-ember-server_3

The `DigestAuth` server middleware's stale-nonce cleanup uses an inverted comparison: it removes *fresh* nonces and stops at the first *stale* one. Because a new nonce is created for every unauthenticated challenge, an attacker can drive the nonce map to grow without bound until the JVM runs out of heap.

## Impact

Unauthenticated remote denial of service (gradual heap exhaustion / OOM) against any service using DigestAuth. The leak is persistent.

## Preconditions

- Application uses `DigestAuth` on at least one route.

## Workarounds

- Front the DigestAuth protected routes with a rate limiter to slow the leak. - Restart periodically.

## Fixes

- The eviction logic is corrected. - A max cache size of 1000000 is imposed to protected against a burst between evictions. This limit is not yet configurable.