HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling due to lenient parsing in the chunk decoder process. An attacker can bypass intermediary controls, poison caches, or hijack the request queue by crafting specially formatted chunked requests that exploit differenc...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling due to lenient parsing in the chunk decoder process. An attacker can bypass intermediary controls, poison caches, or hijack the request queue by crafting specially formatted chunked requests that exploit differenc...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in the HTTP message parsing process. An attacker can bypass intermediary access controls, poison caches, or cause victim requests to be joined with attacker-controlled prefixes by sending requests containing both...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in the HTTP message parsing process. An attacker can bypass intermediary access controls, poison caches, or cause victim requests to be joined with attacker-controlled prefixes by sending requests containing both...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in the HTTP message parsing process. An attacker can bypass intermediary access controls, poison caches, or cause victim requests to be joined with attacker-controlled prefixes by sending requests containing both...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in the HeaderP.parse process. An attacker can bypass access controls, hijack cross-user requests, or poison server caches by crafting HTTP requests with specially formatted Transfer-Encoding header values that...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in the HeaderP.parse process. An attacker can bypass access controls, hijack cross-user requests, or poison server caches by crafting HTTP requests with specially formatted Transfer-Encoding header values that...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in the HeaderP.parse process. An attacker can bypass access controls, hijack cross-user requests, or poison server caches by crafting HTTP requests with specially formatted Transfer-Encoding header values that...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in the HTTP/1.1 parsing process. An attacker can bypass front-end controls, capture another user's headers, or poison a cache by sending requests with differing duplicate Content-Length headers, especially when th...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in the HTTP/1.1 parsing process. An attacker can bypass front-end controls, capture another user's headers, or poison a cache by sending requests with differing duplicate Content-Length headers, especially when th...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling in the HTTP/1.1 parsing process. An attacker can bypass front-end controls, capture another user's headers, or poison a cache by sending requests with differing duplicate Content-Length headers, especially when th...

CVE-2026-69217

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-2026-69205

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...

Http4s: Ember chunk parser lenience (TE.TE request smuggling)

Summary Ember's chunk decoder parses the size token leniently: it strips leading and trailing whitespace and accepts a leading + or - sign. RFC9112 §7.1 defines chunk-size = 1HEXDIG. An intermediary that parses the chunk boundary differently or rejects it will disagree with Ember on request...

GHSA-JRPM-956J-96JG Http4s: Ember chunk parser lenience (TE.TE request smuggling)

Summary Ember's chunk decoder parses the size token leniently: it strips leading and trailing whitespace and accepts a leading + or - sign. RFC9112 §7.1 defines chunk-size = 1HEXDIG. An intermediary that parses the chunk boundary differently or rejects it will disagree with Ember on request...

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

Summary IBM WebSphere Application Server, which is bundled with IBM Enterprise Application Runtimes, 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 Produc...

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

Summary IBM WebSphere Application Server, which is bundled with IBM Cloud Pak for Applications, 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 an...

GHSA-9998-894R-FWVR Http4s Ember Transfer-Encoding value parsing (TE.CL / TE.0 request smuggling)

Summary Ember's HTTP/1.1 header parser matches the Transfer-Encoding header value with a case-sensitive substring test hValue.contains"chunked". RFC 9112 §7 requires transfer-coding names to be compared case-insensitively. A request carrying Transfer-Encoding: Chunked capital C is therefore not...

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

Summary Ember's HTTP/1.1 header parser matches the Transfer-Encoding header value with a case-sensitive substring test hValue.contains"chunked". RFC 9112 §7 requires transfer-coding names to be compared case-insensitively. A request carrying Transfer-Encoding: Chunked capital C is therefore not...

Http4s Ember accepts Transfer-Encoding combined with Content-Length (CL.TE request smuggling)

Summary Ember's HTTP/1.1 request parser does not reject a message that carries both a Transfer-Encoding and a Content-Length header. RFC 9112 §6.1 requires a server to treat such a message as a framing error and close the connection. An intermediary that follows the RFC's CL-strip-and-forward pat...