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CVE-2026-59879

HIGH Exploitation: PoC
8.7
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-59879
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-07-07 16:40 UTC
Published
2026-07-08 15:47 UTC
Last updated
2026-07-08 19:41 UTC
Primary CWE
CWE-190
CWE-190: Integer Overflow or Wraparound
Vendor / Product
immutable-js / immutable-js
Sources
cve.org  ·  NVD

Severity & Metrics

8.7 HIGH CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
immutable-js immutable-js — >= 5.0.0-beta.1, < 5.1.8, < 4.3.9
Weakness (CWE)
CWESourceDescription
CWE-1284 cna CWE-1284: Improper Validation of Specified Quantity in Input
CWE-190 cna CWE-190: Integer Overflow or Wraparound
CWE-400 cna CWE-400: Uncontrolled Resource Consumption
CWE-835 cna CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.7 HIGH 4.0 cna 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
References (5)
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