[ CVE-2026-94265 · Published 20 Oct 2026 ]
Vulnerability in curl
[ Description ]Official description
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`.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ Advisories ]Government CERT advisories
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CERT-FRCERTFR-2026-AVI-1307
Multiple vulnerabilities in Curl Translated from French
Multiple vulnerabilities have been discovered in Curl. Some of them allow an attacker to cause remote arbitrary code execution, remote denial of service and a breach of data confidentiality.
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BSI CERT-BundWID-SEC-2026-3904
cURL: Multiple vulnerabilities Translated from German