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.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-10-12T16:35:40.637Z

Updated: 2024-09-17T13:17:57.774Z

Reserved: 2023-10-04T16:02:46.330Z

Link: CVE-2023-45143

cve-icon Vulnrichment

Updated: 2024-08-02T20:14:19.709Z

cve-icon NVD

Status : Analyzed

Published: 2023-10-12T17:15:10.087

Modified: 2024-02-16T16:09:02.490

Link: CVE-2023-45143

cve-icon Redhat

Severity : Low

Publid Date: 2023-10-12T00:00:00Z

Links: CVE-2023-45143 - Bugzilla