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Vulnerability details

CVE-2026-59879

immutable-js immutable-js

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

CVSS 4.0
8.7High

Official 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 scores

ScoreVersionSourceVector
8.7High 4.0 CVEProject cvelistV5 (CNA) (GitHub_M) 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

Affected products

VendorProductVersionsSource
immutable-js immutable-js < 4.3.9 CVEProject cvelistV5 (CNA)
immutable-js immutable-js >= 5.0.0-beta.1, < 5.1.8 CVEProject cvelistV5 (CNA)

References and advisories

5
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Details

Published
2026-07-08
Last updated
2026-07-08
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.57%
Probability of exploitation in 30 days
47.6%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
Proof of concept
Technical impact
Partial

Weaknesses (CWE)

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