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-2026-69216 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...