{"id":"UBUNTU-CVE-2026-59879","details":"Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, List#set, List#setSize, List#setIn, List#updateIn, and the functional set, setIn, and updateIn mishandle an index or size in the range 2 ** 30 to 2 ** 31 in setListBounds in src/List.js, causing an empty List to enter an uncatchable infinite loop, a populated List to allocate without bound until process abort, or setSize to silently wrap large values. This issue is fixed in versions 4.3.9 and 5.1.8.","modified":"2026-07-15T19:47:49.888248652Z","published":"2026-07-08T17:17:00Z","upstream":["CVE-2026-59879"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-59879"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-59879"},{"type":"REPORT","url":"https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735"}],"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-2026-59879.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_version":"4.0.0-2","binary_name":"node-immutable"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59879.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_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-2026-59879.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_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-2026-59879.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_name":"node-immutable","binary_version":"4.3.8-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59879.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:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}