http4s vulnerabilities
CVEs whose affected-version data names the http4s package (maven). Each record lists the affected and patched versions; check a specific version with the dependency checker or POST /api/sbom.
13 CVEsRSS
CVE-2026-69217High· 8.7Http4s is a Scala interface for HTTP services
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 uses the last value instead of rejecting the message. When an Ember server is b…
CVE-2026-69210High· 7.5Http4s is a Scala interface for HTTP services
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 Integer.MAX_VALUE but permits negative 64-bit lengths. A remote client that comple…
CVE-2026-69218High· 7.5Http4s is a Scala interface for HTTP services
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, H2Connection buffers the header block and subsequent CONTINUATION fragments w…
CVE-2026-69206Medium· 5.9Http4s is a Scala interface for HTTP services
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 nonce-count value it has accepted. When a legitimate client sends noncontiguous nc…
CVE-2026-88975High· 7.5Http4s is a Scala interface for HTTP services
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 buffer the entire payload before comparing it with SETTINGS_MAX_FRAME_SIZE. An u…
CVE-2026-69216Medium· 5.4Http4s is a Scala interface for HTTP services
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 minus signs instead of requiring one or more hexadecimal digits followed by the r…
CVE-2026-69214Medium· 6.8Http4s is a Scala interface for HTTP services
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 without checking that it domain-matches the host that supplied the cookie or rejec…
CVE-2026-69213High· 7.5Http4s is a Scala interface for HTTP services
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 writeLoop. When the peer stops reading, an unauthenticated HTTP/2 client can c…
CVE-2026-69212Medium· 5.9PoCHttp4s is a Scala interface for HTTP services
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 only when a redirect changes authority, but authority comparison excludes the URI…
CVE-2026-69211Medium· 4.8Http4s is a Scala interface for HTTP services
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, and extension values without neutralizing semicolons or control characters. An a…
CVE-2026-69209High· 7.5Http4s is a Scala interface for HTTP services
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 defragmentation accumulates fragments without a limit and FrameTranscoder accepts dec…
CVE-2026-69208High· 7.5Http4s is a Scala interface for HTTP services
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 applic…
CVE-2026-69204Critical· 9.2Http4s is a Scala interface for HTTP services
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 Content-Length, so an intermediary and Ember can select different body framing r…