CVE-2026-69208: Http4s: DigestAuth nonce map grows unbounded
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.
References
- github.com/advisories/GHSA-fm4g-76c9-7w69
- github.com/http4s/http4s/commit/8cfeda8472954d631dfbe5dc026463a27653e482
- github.com/http4s/http4s/releases/tag/v0.23.35
- github.com/http4s/http4s/releases/tag/v1.0.0-M47
- github.com/http4s/http4s/security/advisories/GHSA-fm4g-76c9-7w69
- nvd.nist.gov/vuln/detail/CVE-2026-69208
Code Behaviors & Features
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