Undici's cookie header not cleared on cross-origin redirect in fetch

THẤP 3.5CVE-2023-45143 · GHSA-wqq4-5wpv-mx2g · Công bố 12/10/2023 · cập nhật 17/06/2026

Tóm tắt nhanh

CVE-2023-45143 là lỗ hổng mức THẤP (CVSS 3.5) ảnh hưởng undici (nodejs), undici.
Xác suất bị khai thác trong 30 ngày tới (EPSS): 1.4%, cao hơn 71.9% các lỗ hổng khác.
Cách xử lý: cập nhật lên 5.26.2 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
undici nodejs	`< 5.26.2`	`5.26.2`
undici npm	`< 5.26.2`	`5.26.2`

Mô tả

Impact

Undici clears Authorization headers on cross-origin redirects, but does not clear Cookie headers. By design, cookie headers are forbidden request headers, disallowing them to be set in RequestInit.headers in browser environments. Since Undici handles headers more liberally than the specification, there was a disconnect from the assumptions the spec made, and Undici's implementation of fetch.

As such this may lead to accidental leakage of cookie to a 3rd-party site or a malicious attacker who can control the redirection target (ie. an open redirector) to leak the cookie to the 3rd party site.

Patches

This was patched in e041de359221ebeae04c469e8aff4145764e6d76, which is included in version 5.26.2.

Mô tả của NVD

Undici is an HTTP/1.1 client written from scratch for Node.js. Prior to version 5.26.2, Undici already cleared Authorization headers on cross-origin redirects, but did not clear `Cookie` headers. By design, `cookie` headers are forbidden request headers, disallowing them to be set in RequestInit.headers in browser environments. Since undici handles headers more liberally than the spec, there was a disconnect from the assumptions the spec made, and undici's implementation of fetch. As such this may lead to accidental leakage of cookie to a third-party site or a malicious attacker who can control the redirection target (ie. an open redirector) to leak the cookie to the third party site. This was patched in version 5.26.2. There are no known workarounds.