Immutable.js `List` 32-bit trie overflow → unrecoverable DoS

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Summary

CVECVE-2026-59879
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-08 17:17:26 UTC
Updated2026-07-08 20:16:58 UTC
DescriptionImmutable.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.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-190 | CWE-400 | CWE-835 | CWE-1284 | CWE-190 CWE-190: Integer Overflow or Wraparound | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-835 CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') | CWE-1284 CWE-1284: Improper Validation of Specified Quantity in Input

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Immutable-js Immutable-js affected >= 5.0.0-beta.1, < 5.1.8 Not specified
CNA Immutable-js Immutable-js affected < 4.3.9 Not specified

References

ReferenceSourceLinkTags
github.com/immutable-js/immutable-js/releases/tag/v5.1.8 [email protected] github.com
github.com/immutable-js/immutable-js/releases/tag/v4.3.9 [email protected] github.com
github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d... [email protected] github.com
github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa2... [email protected] github.com
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