CVE-2026-1525

Undici allows duplicate HTTP Content-Length headers when they are provided in an array with case-variant names e.g., Content-Length and content-length. This produces malformed HTTP/1.1 requests with multiple conflicting Content-Length values on the wire. Who is impacted: Applications...

UBUNTU-CVE-2026-32240

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, when using Transfer-Encoding: chunked, if a chunk's size parsed to a value of 2^64 or larger, it would be truncated to a 64-bit integer. In theory, this bug could enable HTTP request/response smuggling. This...

UBUNTU-CVE-2026-1525

Undici allows duplicate HTTP Content-Length headers when they are provided in an array with case-variant names e.g., Content-Length and content-length. This produces malformed HTTP/1.1 requests with multiple conflicting Content-Length values on the wire. Who is impacted: Applications...

CVE-2026-1525

CVE-2026-1525 is an Undici HTTP client issue where passing duplicate Content-Length headers (especially with mixed case variants like Content-Length and content-length) can produce malformed HTTP/1.1 requests and enable HTTP Request Smuggling in misconfigured environments. Public advisories indic...

CVE-2026-1525

Undici allows duplicate HTTP Content-Length headers when they are provided in an array with case-variant names e.g., Content-Length and content-length. This produces malformed HTTP/1.1 requests with multiple conflicting Content-Length values on the wire. Who is impacted: Applications...

HTTP Request Smuggling

Overview org.webjars.npm:undici is an An HTTP/1.1 client, written from scratch for Node.js Affected versions of this package are vulnerable to HTTP Request Smuggling in the processHeader while handling HTTP/1.1 requests containing duplicate Content-Length headers with differing casing. An attacke...

CVE-2026-1525 undici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Undici allows duplicate HTTP Content-Length headers when they are provided in an array with case-variant names e.g., Content-Length and content-length. This produces malformed HTTP/1.1 requests with multiple conflicting Content-Length values on the wire. Who is impacted: Applications...

CVE-2026-1525 undici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Undici allows duplicate HTTP Content-Length headers when they are provided in an array with case-variant names e.g., Content-Length and content-length. This produces malformed HTTP/1.1 requests with multiple conflicting Content-Length values on the wire. Who is impacted: Applications...

HTTP Request Smuggling

Overview undici is an An HTTP/1.1 client, written from scratch for Node.js Affected versions of this package are vulnerable to HTTP Request Smuggling in the processHeader while handling HTTP/1.1 requests containing duplicate Content-Length headers with differing casing. An attacker can bypass...

CVE-2026-1525 undici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Undici allows duplicate HTTP Content-Length headers when they are provided in an array with case-variant names e.g., Content-Length and content-length. This produces malformed HTTP/1.1 requests with multiple conflicting Content-Length values on the wire. Who is impacted: Applications...

CVE-2026-32240

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, when using Transfer-Encoding: chunked, if a chunk's size parsed to a value of 2^64 or larger, it would be truncated to a 64-bit integer. In theory, this bug could enable HTTP request/response smuggling. This...

CVE-2026-32240

Cap'n Proto prior to 1.4.0 has a vulnerability where, with Transfer-Encoding: chunked, a chunk size parsed to >= 2^64 would be truncated to 64 bits, potentially enabling HTTP request/response smuggling. The issue affects Cap'n Proto’s chunked transfer handling and is fixed in 1.4.0. According ...

CVE-2026-32240

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, when using Transfer-Encoding: chunked, if a chunk's size parsed to a value of 2^64 or larger, it would be truncated to a 64-bit integer. In theory, this bug could enable HTTP request/response smuggling. This...

CVE-2026-32239 Cap'n Proto has an integer overflow in KJ-HTTP

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, a negative Content-Length value was converted to unsigned, treating it as an impossibly large length instead. In theory, this bug could enable HTTP request/response smuggling. This vulnerability is fixed in...

CVE-2026-32239

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, a negative Content-Length value was converted to unsigned, treating it as an impossibly large length instead. In theory, this bug could enable HTTP request/response smuggling. This vulnerability is fixed in...

CVE-2026-32239

Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, a negative Content-Length value was converted to unsigned, treating it as an impossibly large length instead. In theory, this bug could enable HTTP request/response smuggling. This vulnerability is fixed in...

PT-2026-25064

Name of the Vulnerable Software and Affected Versions Undici versions prior to 7.24.0 and prior to 6.24.0 Description Undici is susceptible to inconsistent interpretation of HTTP requests, specifically HTTP Request/Response Smuggling. The issue arises when duplicate HTTP Content-Length headers ar...

PT-2026-25069

Name of the Vulnerable Software and Affected Versions Cap'n Proto versions prior to 1.4.0 Description Cap'n Proto is a data interchange format and capability-based RPC system. Prior to version 1.4.0, when using Transfer-Encoding: chunked, if a chunk's size was parsed to a value of 2^64 or larger,...

PT-2026-25068

Name of the Vulnerable Software and Affected Versions Cap'n Proto versions prior to 1.4.0 Description Cap'n Proto is a data interchange format and capability-based RPC system. Prior to version 1.4.0, a negative Content-Length value was converted to unsigned, resulting in it being treated as an...

PT-2026-25066

Name of the Vulnerable Software and Affected Versions undici versions prior to 7.24.0 and prior to 6.24.0 Description The issue arises when an application passes user-controlled input to the upgrade option of the client.request function. This allows an attacker to inject CRLF Carriage Return Line...