{"id":"CVE-2026-86414","published":"2026-10-20T21:17:19.947","lastModified":"2026-10-22T16:57:53.407","description":"An HTTP proxy can trick libcurl into sending the origin's credentials (Basic\npassword, or a Negotiate/Kerberos ticket) to the proxy itself, by answering\nthe `CONNECT` tunnel request with 401 `WWW-Authenticate:` instead of the\nexpected 407 `Proxy-Authenticate:`.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://curl.se/docs/CVE-2026-86414.html","tags":[]},{"url":"https://curl.se/docs/CVE-2026-86414.json","tags":[]},{"url":"https://hackerone.com/reports/3993566","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}