{"action":"Upgrade aiosmtplib to 5.1.2-1 or later.","affected":[{"fixed":"5.1.2-1","introduced":"0"}],"component":"aiosmtplib","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["5.1.2-1"],"id":"tcs_01M5NT0AP932GWZRN1YBTT3C6K","modified_at":"2026-10-23T17:47:33.543831675Z","published_at":"2026-08-20T15:17:31.980Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-55558","https://security-tracker.debian.org/tracker/CVE-2026-55558"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-55558#Debian:14/aiosmtplib","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-55558"}],"summary":"aiosmtplib is an asynchronous SMTP client for use with asyncio. Prior to 5.1.2, SMTPProtocol.start_tls in src/aiosmtplib/protocol.py consumes the server's 220 response and starts the TLS handshake wit"}