{"cve":"CVE-2026-59879","nvd":{"published":"2026-07-08T17:17:26.370","modified":"2026-07-10T18:48:54.280","status":"Analyzed","description":"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.","cvss_v4":{"vector":"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","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-190","CWE-400","CWE-835","CWE-1284"],"references":["https://github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d06594ffe4b84","https://github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa210a95a04304a","https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9","https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8","https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735"],"products":["immutable-js:immutable"],"source":"nvd","synced_at":"2026-10-19T22:42:16.820116992+00:00"},"epss":{"cve":"CVE-2026-59879","score":0.00575,"percentile":0.47478,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-v56q-mh7h-f735","url":"https://osv.dev/vulnerability/GHSA-v56q-mh7h-f735","summary":"Immutable.js `List` 32-bit trie overflow → unrecoverable DoS","modified":"2026-09-16T19:00:05.205190333Z","packages":[{"ecosystem":"npm","name":"immutable","purl":"pkg:npm/immutable","ranges":[">=4.0.0-rc.1 <4.3.9"],"fixed":["4.3.9"]},{"ecosystem":"npm","name":"immutable","purl":"pkg:npm/immutable","ranges":[">=5.0.0-beta.1 <5.1.8"],"fixed":["5.1.8"]},{"ecosystem":"npm","name":"immutable","purl":"pkg:npm/immutable","ranges":["<3.8.4"],"fixed":["3.8.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}