HTTP Response Desynchronization

undici is vulnerable to HTTP Response Desynchronization. The vulnerability is due to improper Content-Length handling after retrying or resuming partial responses, where a stale length can be retained for a differently sized response body, potentially causing downstream response desynchronization...

Information Disclosure

undici is vulnerable to Sensitive Information Exposure. The vulnerability is due to improper parsing of whitespace around qualified Cache-Control directives, causing authenticated responses to be incorrectly stored in shared caches and potentially served to unauthorized users...

CRLF Injection

undici is vulnerable to CRLF Injection. The vulnerability is due to undici not validating the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher, where an attacker can inject CRLF sequences and append arbitrary HTTP headers,...

GHSA-M8RV-5G2X-5CG5 undici vulnerable to CRLF Injection via blob-like body 'type' property

Impact When an application passes a duck-typed blob-like body to undici's HTTP/1.1 dispatcher via request, stream, pipeline, or dispatch with a .type derived from untrusted input, an attacker can inject CRLF sequences \r\n to append arbitrary HTTP headers and potentially smuggle a second request...

EUVD-2026-50568

undici vulnerable to CRLF Injection via blob-like body 'type' property...

GHSA-V3R7-H72X-CJCM undici vulnerable to cookie attribute injection via unsanitized domain and unparsed setCookie fields

Impact The setCookie function has two attribute injection paths. validateCookieDomain does not reject semicolons validateCookiePath already does at 0x3B, so a domain value like example.com; SameSite=None lands verbatim as Domain=example.com; SameSite=None. The unparsed array's loop only checks ea...

NPM: undici vulnerable to cross-user information disclosure and parse-time crash via degenerate private cache directives

NPM: undici vulnerable to cross-user information disclosure and parse-time crash via degenerate private cache directives vulnerability discovered by ? in WordPress Npm undici versions = 7.0.0, 7.29.0...

SUSE CVE-2026-15157

undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, an application that passes a hand-rolled blob-like...

CRLF Injection

Overview undici is an An HTTP/1.1 client, written from scratch for Node.js Affected versions of this package are vulnerable to CRLF Injection via the writeH1 path in lib/dispatcher/client-h1.js. An attacker can append arbitrary HTTP headers or smuggle a second request by supplying a duck-typed...

CVE-2026-15157

undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, an application that passes a hand-rolled blob-like...

undici: undici: Information disclosure and Denial of Service via malformed Cache-Control directives

A flaw was found in undici. This vulnerability allows for cross-user information disclosure when malformed Cache-Control private directives cause private response bodies and headers, such as Set-Cookie data, to be stored in a shared cache and subsequently exposed to other users. Additionally, a...

CVE-2026-15157

undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, an application that passes a hand-rolled blob-like...

CVE-2026-15157 undici vulnerable to CRLF Injection via blob-like body 'type' property

undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, an application that passes a hand-rolled blob-like...

CVE-2026-14643 undici vulnerable to cross-user information disclosure via whitespace around equals in Cache-Control directives

undici's cache interceptor mishandles optional whitespace placed around the equals sign of a qualified no-cache or private Cache-Control directive. In undici from 7.0.0 up to before 7.29.0 and from 8.0.0 up to before 8.9.0, the parser either drops the directive or stores a field name with literal...

Linux Distros Unpatched Vulnerability : CVE-2026-16729

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - undici's setCookie function does not fully sanitize cookie attributes. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9....

undici: undici: Denial of Service due to unbounded memory growth via WebSocket frames

A flaw was found in undici. A malicious WebSocket server can exploit this by streaming numerous small or empty continuation frames. This can bypass per-frame and cumulative-size validation, leading to unbounded memory growth in the client process. The primary consequence is memory exhaustion,...

Security Bulletin: Vulnerability in undici bundled with IBM Fusion, IBM Fusion HCI, and IBM Fusion Content-Aware Storage

Summary IBM Fusion, IBM Fusion HCI, and IBM Fusion Content-Aware Storage include the undici library, which is affected by a denial of service vulnerability. CVE-2026-22036 Vulnerability Details CVEID:CVE-2026-22036 DESCRIPTION: Undici is an HTTP/1.1 client for Node.js. Prior to 7.18.0 and 6.23.0,...

undici: Undici: Information disclosure due to improper cache-control header parsing

A flaw was found in Undici. The cache interceptor in shared-cache mode incorrectly classifies certain responses as cacheable due to improper handling of whitespace-padded Cache-Control header field names. This vulnerability allows an unauthenticated attacker to access authenticated user data from...

undici: Undici: Response queue poisoning on reused keep-alive sockets can lead to incorrect response delivery.

A flaw was found in undici. An attacker-controlled upstream server can exploit a vulnerability in Undici's HTTP/1.1 client, specifically related to response queue poisoning on reused keep-alive sockets. This allows the attacker to inject an unsolicited HTTP/1.1 response onto an idle socket...

undici: Undici: Response queue poisoning on reused keep-alive sockets can lead to incorrect response delivery.

A flaw was found in undici. An attacker-controlled upstream server can exploit a vulnerability in Undici's HTTP/1.1 client, specifically related to response queue poisoning on reused keep-alive sockets. This allows the attacker to inject an unsolicited HTTP/1.1 response onto an idle socket...