{"action":"Upgrade mruby to 4.0.0-1 or later.","affected":[{"fixed":"4.0.0-1","introduced":"0"}],"component":"mruby","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["4.0.0-1"],"id":"tcs_01M5NQXZ3NV9Q1Z7SV6FPHQMD8","modified_at":"2026-10-01T03:02:30.355519369Z","published_at":"2026-02-06T05:16:12.667Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-1979","https://security-tracker.debian.org/tracker/CVE-2026-1979"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-1979#Debian:14/mruby","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-1979"}],"summary":"A flaw has been found in mruby up to 3.4.0. This affects the function mrb_vm_exec of the file src/vm.c of the component JMPNOT-to-JMPIF Optimization. Executing a manipulation can lead to use after fre"}