Microsoft Security Response Center guidance
Vendor revision: Oct 23, 2026Release Notes
Vulnerability intelligence
CVE-2026-94265. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
Release Notes
When processing an HTTP redirect to a URL containing userinfo (a `username:password` component), curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state.
Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl to send a freshly minted Kerberos ticket—generated using the ambient identity of the client process to an untrusted third-party host, effectively bypassing the domain-scoping restrictions normally enforced by the absence of `--location-trusted`.
Source: NVD