{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"curl","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":[],"id":"tcs_01M5NW14N8XW07M41A895JM9VR","modified_at":"2026-10-23T17:47:33.763391268Z","published_at":"2026-10-20T20:17:25.223Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-86409","https://security-tracker.debian.org/tracker/CVE-2026-86409"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-86409#Debian:13/curl","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-86409"}],"summary":"Setting `CURLOPT_AWS_SIGV4` to NULL but does not disable SigV4 authentication, contrary to expectations and documentation. A subsequent transfer on the same handle still sends an `Authorization: AWS4-"}