{"action":"Upgrade protobufjs to 8.6.5 or later.","affected":[{"fixed":"8.6.5","introduced":"8.2.0"}],"component":"protobufjs","cve_ids":["CVE-2026-59876"],"ecosystem":"npm","epss":0.00349,"exploited":false,"fixed_versions":["8.6.5"],"ghsa_id":"GHSA-jfj6-75fj-8934","id":"tcs_01M5KFXWAC2KHP71RN2YEPN5MF","modified_at":"2026-09-10T03:50:12.269296263Z","published_at":"2026-07-20T22:04:07Z","references":["https://osv.dev/vulnerability/GHSA-jfj6-75fj-8934","https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-jfj6-75fj-8934","https://nvd.nist.gov/vuln/detail/CVE-2026-59876","https://github.com/protobufjs/protobuf.js/pull/2335","https://github.com/protobufjs/protobuf.js/commit/9f97fe413072d3beb52c74e62d88ea8adc9444d8","https://github.com/protobufjs/protobuf.js","https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.6.5"],"severity":{"label":"medium","score":4.8},"sources":[{"source":"osv","source_id":"GHSA-jfj6-75fj-8934","url":"https://osv.dev/vulnerability/GHSA-jfj6-75fj-8934"}],"summary":"protobufjs: Text Format string map parsing can mutate returned map object prototype"}