{"id":"UBUNTU-CVE-2026-29063","details":"Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5.","modified":"2026-06-30T18:17:46.659824832Z","published":"2026-03-06T19:16:00Z","upstream":["CVE-2026-29063"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-29063"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-29063"},{"type":"REPORT","url":"https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3"},{"type":"REPORT","url":"https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8"},{"type":"REPORT","url":"https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5"},{"type":"REPORT","url":"https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw"}],"affected":[{"package":{"name":"node-immutable","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-immutable?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.2+dfsg-3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.8.2+dfsg-3","binary_name":"node-immutable"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29063.json"}},{"package":{"name":"node-immutable","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-immutable?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.2+dfsg-3","4.0.0-1","4.0.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"node-immutable","binary_version":"4.0.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29063.json"}},{"package":{"name":"node-immutable","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-immutable?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1.0-3","4.3.4-1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.3.4-1","binary_name":"node-immutable"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29063.json"}},{"package":{"name":"node-immutable","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/node-immutable?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-immutable","binary_version":"4.3.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29063.json"}},{"package":{"name":"node-immutable","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-immutable?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.4-1","4.3.8-2"],"ecosystem_specific":{"binaries":[{"binary_version":"4.3.8-2","binary_name":"node-immutable"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29063.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}