CVE-2026-69217 Http4s: Ember Server accepts duplicate Content-Length headers

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 behind a keep-alive intermediary that selects a different...

CVE-2026-69217 Http4s: Ember Server accepts duplicate Content-Length headers

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 behind a keep-alive intermediary that selects a different...

CVE-2026-69217

Http4s (a Scala HTTP service interface) is vulnerable to CL.CL request smuggling due to its Ember HTTP/1.1 parser accepting differing duplicate Content-Length headers and using the last value instead of rejecting the message. Affected versions are prior to 0.23.35 and 1.0.0-M47 . When an Ember se...

EUVD-2026-79193

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 behind a keep-alive intermediary that selects a different...

CVE-2026-69217 Http4s: Ember Server accepts duplicate Content-Length headers

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 behind a keep-alive intermediary that selects a different...

CVE-2026-69216

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 required CRLF. When an intermediary forwards chunked data...

CVE-2026-69204

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 rules. When ember-server is behind a keep-alive intermediary...

CVE-2026-69205 Http4s: Ember Transfer-Encoding value parsing (TE.CL / TE.0 request smuggling)

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-Encoding value and decodes header bytes with the platform default charset. Values such as Chunked are not recognized, values such as notchunke...

CVE-2026-69205 Http4s: Ember Transfer-Encoding value parsing (TE.CL / TE.0 request smuggling)

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-Encoding value and decodes header bytes with the platform default charset. Values such as Chunked are not recognized, values such as notchunke...

EUVD-2026-79190

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-Encoding value and decodes header bytes with the platform default charset. Values such as Chunked are not recognized, values such as notchunke...

CVE-2026-69205 Http4s: Ember Transfer-Encoding value parsing (TE.CL / TE.0 request smuggling)

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-Encoding value and decodes header bytes with the platform default charset. Values such as Chunked are not recognized, values such as notchunke...

CVE-2026-69205

Http4s (a Scala HTTP library) is affected in its Ember backend, specifically the HeaderP.parse function, which uses a case-sensitive substring test for the Transfer-Encoding value and decodes header bytes with the platform default charset. This causes mismatches with RFC-compliant intermediaries,...

Security Bulletin: IBM WebSphere Application Server, which is bundled with IBM WebSphere Hybrid Edition, is affected by an HTTP request smuggling vulnerability (CVE-2026-11710)

Summary IBM WebSphere Application Server, which is bundled with IBM WebSphere Hybrid Edition, is affected by an HTTP request smuggling vulnerability. Vulnerability Details Refer to the security bulletins listed in the Remediation/Fixes section Affected Products and Versions Affected Products and...

CVE-2026-69216 Http4s: Ember chunk parser lenience (TE.TE request smuggling)

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 required CRLF. When an intermediary forwards chunked data...

CVE-2026-69216 Http4s: Ember chunk parser lenience (TE.TE request smuggling)

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 required CRLF. When an intermediary forwards chunked data...

CVE-2026-69216

Http4s is a Scala library for HTTP services. Prior to 0.23.35 and 1.0.0-M47 , the Ember chunk decoder accepted leading plus or minus signs in the chunk-size token instead of requiring one or more hexadecimal digits followed by CRLF. This leniency allows an unauthenticated attacker to construct TE...

EUVD-2026-79176

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 required CRLF. When an intermediary forwards chunked data...

CVE-2026-69216 Http4s: Ember chunk parser lenience (TE.TE request smuggling)

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 required CRLF. When an intermediary forwards chunked data...

CVE-2026-69204

CVE-2026-69204 affects Http4s , a Scala HTTP library, specifically the Ember HTTP/1.1 implementation. The root cause is that Ember does not reject messages containing both Transfer-Encoding and Content-Length headers, allowing an intermediary and Ember to select different body framing rules. This...

EUVD-2026-79025

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 rules. When ember-server is behind a keep-alive intermediary...