• Project uses undici 6.x before 6.29.1, 7.x before 7.30.1, or 8.x before 8.12.2.
• Application calls undici's fetch() against servers that may be attacker-controlled or malicious.
• The server responds with more than five content codings and closes the connection before sending the body.

Affected

undici >=6.23.0 <6.29.1 · undici >=7.18.0 <7.30.1 · undici >=8.0.0 <8.12.2

Fixed in

6.29.1 · 7.30.1 · 8.12.2

ID

GHSA-xjj6-f33q-929c

• Project uses undici's EventSource client.
• undici version is below 6.29.1, 7.30.1, or 8.12.2 in the respective major line.
• The application maintains an EventSource connection to an untrusted or potentially compromised Server-Sent Events peer that controls the response.

Affected

undici >=6.5.0 <6.29.1 · undici >=7.0.0 <7.30.1 · undici >=8.0.0 <8.12.2

Fixed in

6.29.1 · 7.30.1 · 8.12.2

ID

GHSA-4qv8-2p9j-2685

• Project uses undici at version 7.15.0 or later, below the patched releases 7.30.1 / 8.12.2.
• Application calls undici's fetch() with Subresource Integrity (integrity) metadata.
• The integrity metadata uses an uppercase or mixed-case algorithm token (e.g. SHA256- or Sha256-).
• An attacker can control the response body returned by the server.

Affected

undici >=7.15.0 <7.30.1 · undici >=8.0.0 <8.12.2

Fixed in

7.30.1 · 8.12.2

ID

GHSA-f72v-6w45-q472

• Project uses undici at a version before 6.29.1, 7.30.1, or 8.12.2.
• Requests are made through undici's Agent (including as default dispatcher for request, fetch, setGlobalDispatcher) or EnvHttpProxyAgent on direct/NO_PROXY routes.
• The Agent is constructed with a function-valued tls option, such as a custom checkServerIdentity callback for certificate or public-key pinning.
• The TLS options are passed via the tls option rather than via connect.

Affected

undici >=4.0.0 <6.29.1 · undici >=7.0.0 <7.30.1 · undici >=8.0.0 <8.12.2

Fixed in

6.29.1 · 7.30.1 · 8.12.2

ID

GHSA-2m5v-pch6-74hx

• Project uses undici (directly or via Node.js global fetch()) at a version before 6.29.1, 7.30.1, or 8.12.2.
• The client makes HTTPS requests to an endpoint that is malicious or compromised.
• The connection to that endpoint negotiates TLS 1.2 (not restricted to TLS 1.3).
• The server initiates renegotiation after the connection is established and presents a different CA-trusted certificate whose hostname does not match the requested host.

Affected

undici >=4.2.1 <6.29.1 · undici >=7.0.0 <7.30.1 · undici >=8.0.0 <8.12.2

Fixed in

6.29.1 · 7.30.1 · 8.12.2

ID

GHSA-qrxm-fqhp-jwvm

• Project uses undici's WebSocket client (directly or via Node.js's bundled globalThis.WebSocket).
• Installed undici version is 5.15.0 or later in the 5.x line, or a 6.x, 7.x, or 8.x release earlier than 6.29.1, 7.30.1, or 8.12.2 respectively.
• The client connects to a WebSocket server that is malicious or compromised and can stream PING frames without reading PONG responses.

Affected

undici >=5.15.0 <6.29.1 · undici >=7.0.0 <7.30.1 · undici >=8.0.0 <8.12.2

Fixed in

6.29.1 · 7.30.1 · 8.12.2

ID

GHSA-9fm3-97px-rjf6

• Project uses undici at a version before 7.30.1 (7.x) or before 8.12.2 (8.x).
• The client composes undici's decompress interceptor with a downstream response handler that throws during response processing (e.g. the dump interceptor with maxSize).
• The client makes requests to an HTTP server that may be malicious or compromised and can return a compressed body that decompresses beyond the configured limit.

Affected

undici >=7.15.0 <7.30.1 · undici >=8.0.0 <8.12.2

Fixed in

7.30.1 · 8.12.2

ID

GHSA-55wc-3pg8-jfw6

Source summary

Impact undici's experimental WebSocket client (enabled by default via allowH2: true ) crashes the Node.js process when it connects to a malicious server over HTTP/2. If the server answers the WebSocket upgrade with a response that fails handshake validation, undici aborts the request, but the abort is a no-op because the request is already marked completed, so the underlying ClientHttp2Stream is left open with no error listener. When the server then destroys the connection, the orphaned stream emits an unhandled error and the process exits. A remote, unauthenticated server can therefore deny s

Affected

undici >=8.11.0 <8.11.2

Fixed in

8.11.2

ID

GHSA-qq8j-7v2v-3rwp