GHSA-7ppr-r889-mcf2: blaze: Unbounded WebSocket message aggregation in http4s-blaze-server
(updated )
http4s-blaze-server aggregates the fragments of an incoming WebSocket
message with no limit on total size or fragment count. A client that
completes a WebSocket handshake can send an unterminated fragmented
message and drive unbounded heap growth in the server JVM, resulting in
denial of service via OutOfMemoryError.
References
- github.com/advisories/GHSA-7ppr-r889-mcf2
- github.com/http4s/blaze/commit/173e8ca820a0d12110bfe409c72e9b9c3d28d471
- github.com/http4s/blaze/commit/2ae13a74d55209b6573d5228d1aa94f0361a75d0
- github.com/http4s/blaze/commit/fadbe6d0f7f59045425688d313c8d4804973d12f
- github.com/http4s/blaze/releases/tag/v0.23.18
- github.com/http4s/blaze/releases/tag/v1.0.0-M42
- github.com/http4s/blaze/security/advisories/GHSA-7ppr-r889-mcf2
- nvd.nist.gov/vuln/detail/CVE-2026-73493
Code Behaviors & Features
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