{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-59879", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-07T16:40:07.982Z", "datePublished": "2026-07-08T15:47:24.885Z", "dateUpdated": "2026-07-08T19:41:12.330Z"}, "containers": {"cna": {"title": "Immutable.js `List` 32-bit trie overflow \u2192 unrecoverable DoS", "problemTypes": [{"descriptions": [{"cweId": "CWE-190", "lang": "en", "description": "CWE-190: Integer Overflow or Wraparound", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-835", "lang": "en", "description": "CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1284", "lang": "en", "description": "CWE-1284: Improper Validation of Specified Quantity in Input", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "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", "version": "4.0"}}], "references": [{"name": "https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735"}, {"name": "https://github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d06594ffe4b84", "tags": ["x_refsource_MISC"], "url": "https://github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d06594ffe4b84"}, {"name": "https://github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa210a95a04304a", "tags": ["x_refsource_MISC"], "url": "https://github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa210a95a04304a"}, {"name": "https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9", "tags": ["x_refsource_MISC"], "url": "https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9"}, {"name": "https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8", "tags": ["x_refsource_MISC"], "url": "https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8"}], "affected": [{"vendor": "immutable-js", "product": "immutable-js", "versions": [{"version": ">= 5.0.0-beta.1, < 5.1.8", "status": "affected"}, {"version": "< 4.3.9", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-08T15:47:24.885Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-v56q-mh7h-f735", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-08T17:51:48.441737Z", "id": "CVE-2026-59879", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-08T19:41:12.330Z"}}]}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.0.0-beta.1,5.1.8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.3.9)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "immutable-js", "source": "cna", "vendor": "immutable-js"}, "product": "immutable-js", "vendor": "immutable-js"}], "created": "2026-07-08T17:30:03.725529+00:00", "updated": "2026-07-08T17:30:03.725549+00:00", "vendors": ["immutable-js", "immutable-js$PRODUCT$immutable-js"]}