{"id":"CVE-2026-94265","title":"Authorization: Negotiate sent to foreign origin","summary":"When processing an HTTP redirect to a URL containing userinfo (a\n`username:password` component), curl might erroneously retain and re-transmit\nthe original host's HTTP Negotiate authentication state. Consequently, a\nmalicious server can …","severity":"none","cwe":["CWE-200"],"vendor":"curl","product":"curl","affected":["curl >= 8.22.0 <= 8.22.0","curl >= 8.21.0 <= 8.21.0"],"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T20:26:18.061Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-94265","references":[{"url":"https://curl.se/docs/CVE-2026-94265.json","label":"json"},{"url":"https://curl.se/docs/CVE-2026-94265.html","label":"www"},{"url":"https://hackerone.com/reports/4040551","label":"issue"}],"tags":["cve.org"],"ingestedAt":"2026-10-20T21:19:21.271Z","slug":"CVE-2026-94265","body":"## Overview\n\nWhen processing an HTTP redirect to a URL containing userinfo (a\n`username:password` component), curl might erroneously retain and re-transmit\nthe original host's HTTP Negotiate authentication state. Consequently, a\nmalicious server can trigger a redirect containing arbitrary userinfo to force\ncurl to send a freshly minted Kerberos ticket—generated using the ambient\nidentity of the client process to an untrusted third-party host, effectively\nbypassing the domain-scoping restrictions normally enforced by the absence of\n`--location-trusted`.\n\n## Affected\n\n- `curl >= 8.22.0 <= 8.22.0`\n- `curl >= 8.21.0 <= 8.21.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}