{"action":"Upgrade mbedtls to 3.6.6-0.1 or later.","affected":[{"fixed":"3.6.6-0.1","introduced":"0"}],"component":"mbedtls","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["3.6.6-0.1"],"id":"tcs_01M5NRSWEBZP9FB6C9EG6XFB33","modified_at":"2026-10-01T03:03:10.675274506Z","published_at":"2026-04-01T21:17:01.990Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-34873","https://security-tracker.debian.org/tracker/CVE-2026-34873"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-34873#Debian:14/mbedtls","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-34873"}],"summary":"An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1.3 session."}