{"action":"Upgrade flatpak to 1.18.4-1 or later.","affected":[{"fixed":"1.18.4-1","introduced":"0"}],"component":"flatpak","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1.18.4-1"],"id":"tcs_01M5NX2DMFJD6KCDW80YV107QD","modified_at":"2026-09-30T16:00:25.516475314Z","published_at":"2026-09-29T04:18:02.573Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-97029","https://security-tracker.debian.org/tracker/CVE-2026-97029"],"severity":{"label":"medium","score":5.7},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-97029#Debian:14/flatpak","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-97029"}],"summary":"Flatpak's process ID namespace separation does not prevent a sandboxed app's kill(0, signal) or killpg(0, signal) calls from reaching processes outside the sandbox that share the same process group. A"}