Package · Maven

org.http4s:http4s-blaze-server_2.12

2 known vulnerabilities.

All Critical High Medium Low Exploited only Public exploit

2 results · Feed

High 7.5

CVE-2026-73493

http4s-blaze-server: Unbounded WebSocket message aggregation

Http4s (http4s-blaze-server) is a minimal, idiomatic Scala interface for HTTP services. Prior to 0.23.18 and 1.0.0-M42, http4s-blaze-server aggregates fragments of an incoming WebSocket message with no limit on total size or fragment count. A client that comp…

http4s blaze org.http4s:http4s-blaze-server_2.13 org.http4s:http4s-blaze-server_2.12 Maven

Aug 12, 2026
High 7.5

CVE-2021-21294

Unbounded connection acceptance in http4s-blaze-server

Http4s (http4s-blaze-server) is a minimal, idiomatic Scala interface for HTTP services. Http4s before versions 0.21.17, 0.22.0-M2, and 1.0.0-M14 have a vulnerability which can lead to a denial-of-service. Blaze-core, a library underlying http4s-blaze-server, …

http4s http4s org.http4s:http4s-blaze-server_2.13 org.http4s:http4s-blaze-server_2.12 Maven

Feb 2, 2021