{"action":"Upgrade wolfssl to 4.5.0+dfsg-1 or later.","affected":[{"fixed":"4.5.0+dfsg-1","introduced":"0"}],"component":"wolfssl","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.5.0+dfsg-1"],"id":"tcs_01M5NEHQDFQ0RP2T76WDHYFZ6Y","modified_at":"2026-10-26T12:01:33.662000076Z","published_at":"2020-08-21T14:15:10.997Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-12457","https://security-tracker.debian.org/tracker/CVE-2020-12457"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-12457#Debian:13/wolfssl","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-12457"}],"summary":"An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher_spec (CCS) message processing logic for TLS 1.3. If an attacker sends ChangeCipherSpec messages in a crafted way involv"}