{"action":"Upgrade immutable to 3.8.3 or later.","affected":[{"fixed":"4.3.8","introduced":"4.0.0-rc.1"},{"fixed":"5.1.5","introduced":"5.0.0"},{"fixed":"3.8.3","introduced":"0"}],"component":"immutable","cve_ids":["CVE-2026-29063"],"ecosystem":"npm","epss":0.0099,"exploited":false,"fixed_versions":["4.3.8","5.1.5","3.8.3"],"ghsa_id":"GHSA-wf6x-7x77-mvgw","id":"tcs_01M5KGEVMZAEA8238GREX11F9H","modified_at":"2026-09-10T03:50:41.600173338Z","published_at":"2026-03-04T21:28:06Z","references":["https://osv.dev/vulnerability/GHSA-wf6x-7x77-mvgw","https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw","https://nvd.nist.gov/vuln/detail/CVE-2026-29063","https://github.com/immutable-js/immutable-js/issues/2178","https://github.com/immutable-js/immutable-js/commit/16b3313fdf2c5f579f10799e22869f6909abf945","https://github.com/immutable-js/immutable-js/commit/6e2cf1cfe6137e72dfa48fc2cfa8f4d399d113f9","https://github.com/immutable-js/immutable-js/commit/6ed4eb626906df788b08019061b292b90bc718cb","https://github.com/immutable-js/immutable-js","https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3","https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8","https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"GHSA-wf6x-7x77-mvgw","url":"https://osv.dev/vulnerability/GHSA-wf6x-7x77-mvgw"}],"summary":"Immutable is vulnerable to Prototype Pollution"}