CVE-2026-13697

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 specially crafted Cache-Control header can trigger an unhandled error in the cache parser, leading to a process termination and a Denial of Service (DoS). Both issues affect applications using the cache interceptor in shared mode.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.