{"action":"Upgrade firefox-esr to 128.10.0esr-1~deb12u1 or later.","affected":[{"fixed":"128.10.0esr-1~deb12u1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["128.10.0esr-1~deb12u1"],"id":"tcs_01M5NNVM8GR15V2T6K91N9AH1H","modified_at":"2026-10-06T09:47:34.021109779Z","published_at":"2025-04-29T14:15:35.357Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-4087","https://security-tracker.debian.org/tracker/CVE-2025-4087"],"severity":{"label":"medium","score":4.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-4087","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-4087"}],"summary":"A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and"}