CVE-2026-61741 | Critical | 9.3 | 2026-09-24 | http4s-scala-xml provides `EntityDecoder[F, scala.xml.Elem]` instances that parse XML message bodies. Prior to versions 0.24.1 and 1.0.0-M39, these decoders us… |
CVE-2026-88975 | High | 7.5 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.37 and 1.0.0-M48, Ember’s HTTP/2 read loop parses a frame’s 24-bit declared length but waits to bu… |
CVE-2026-69218 | High | 7.5 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, When Ember receives an HTTP/2 HEADERS or PUSH_PROMISE frame without END_HEADERS… |
CVE-2026-69217 | High | 8.7 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember’s HTTP/1.1 parser accepts differing duplicate Content-Length headers and u… |
CVE-2026-69215 | Medium | 6.8 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware uses unanchored substring checks instead of RFC… |
CVE-2026-69210 | High | 7.5 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, WebSocket FrameTranscoder.bodyLength rejects extended payload lengths above Inte… |
CVE-2026-69206 | Medium | 5.9 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, DigestAuth replay protection records lastNc plus one instead of the highest nonc… |
CVE-2026-69205 | High | 8.7 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember’s HeaderP.parse uses a case-sensitive substring test for the Transfer-Enco… |
CVE-2026-69203 | High | 7.5 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, An Ember server with HTTP/2 enabled through withHttp2 does not enforce SETTINGS_… |
CVE-2026-69202 | High | 7.5 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember’s HTTP/2 flow-control window is replenished according to bytes received fr… |
CVE-2026-69216 | Medium | 5.4 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember’s chunk decoder trims the chunk-size token and accepts leading plus or min… |
CVE-2026-69214 | Medium | 6.8 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware stores a response cookie’s Domain attribute with… |
CVE-2026-69213 | High | 7.5 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/2 serializes outbound frames through one unbounded queue consumed by… |
CVE-2026-69212 | Medium | 5.9 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The FollowRedirect client middleware strips Authorization and Cookie headers onl… |
CVE-2026-69211 | Medium | 4.8 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, ResponseCookie.render writes attacker-influenced name, content, domain, path, an… |
CVE-2026-69209 | High | 7.5 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The shared WebSocket decoder permits unbounded message buffering because defragm… |
CVE-2026-69208 | High | 7.5 | 2026-09-15 | 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… |
CVE-2026-69204 | | | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/1.1 does not reject messages containing both Transfer-Encoding and Co… |
CVE-2026-69201 | Medium | 5.9 | 2026-09-15 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, ResourceService and WebjarService decode each URL path segment but reject only s… |
CVE-2026-73494 | High | 7.4 | 2026-09-14 | blaze is a Scala library for building asynchronous pipelines, with a focus on network IO. Prior to 0.23.18 and from 1.0.0-M1 until 1.0.0-M42, five HTTP/1.1 con… |
CVE-2026-54556 | | | 2026-08-26 | Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, an unauthenticated HTTP/2 peer can cause an out-of-memory denial of service in t… |
CVE-2026-73495 | High | 7.4 | 2026-08-12 | blaze is a Scala library for building asynchronous pipelines, with a focus on network IO. Prior to 0.23.18 and 1.0.0-M42, blaze-server can merge HTTP/1.1 chunk… |
CVE-2026-73493 | High | 7.5 | 2026-08-12 | 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 fragment… |
CVE-2025-59822 | High | 7.5 | 2025-09-23 | Http4s is a Scala interface for HTTP services. In versions from 1.0.0-M1 to before 1.0.0-M45 and before 0.23.31, http4s is vulnerable to HTTP Request Smuggling… |
CVE-2023-22465 | High | 7.5 | 2023-01-04 | Http4s is a Scala interface for HTTP services. Starting with version 0.1.0 and prior to versions 0.21.34, 0.22.15, 0.23.17, and 1.0.0-M38, the `User-Agent` and… |
CVE-2021-41084 | High | 8.7 | 2021-09-21 | http4s is an open source scala interface for HTTP. In affected versions http4s is vulnerable to response-splitting or request-splitting attacks when untrusted… |
CVE-2021-39185 | Critical | 9.1 | 2021-09-01 | Http4s is a minimal, idiomatic Scala interface for HTTP services. In http4s versions 0.21.26 and prior, 0.22.0 through 0.22.2, 0.23.0, 0.23.1, and 1.0.0-M1 thr… |
CVE-2021-32643 | Medium | 5.8 | 2021-05-27 | Http4s is a Scala interface for HTTP services. `StaticFile.fromUrl` can leak the presence of a directory on a server when the `URL` scheme is not `file://`, an… |
CVE-2021-21294 | High | 7.5 | 2021-02-02 | 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 vulnera… |
CVE-2021-21293 | High | 7.5 | 2021-02-02 | blaze is a Scala library for building asynchronous pipelines, with a focus on network IO. All servers running blaze-core before version 0.14.15 are affected by… |
CVE-2020-5280 | High | 7.6 | 2020-03-25 | http4s before versions 0.18.26, 0.20.20, and 0.21.2 has a local file inclusion vulnerability. This vulnerability applies to all users of org.http4s.server.stat… |