HOMEVULNERABILITIESCVE-2026-59879
HIGH

CVE-2026-59879

CWE-190Published: July 8, 2026· Updated: Jul 10, 2026

7.5
CVSS v3.1
EPSS:0.30%probability of exploitation in 30 daysPercentile:21.9th

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.

NVD Source

Technical Analysis

CVE-2026-59879 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

immutable-js1 product(s)
immutable
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d06594ffe4b84
PATCHhttps://github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa210a95a04304a
ADVISORYhttps://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735
ADVISORYhttps://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735

All References (6)

→
https://github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d06594ffe4b84Patch
→
https://github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa210a95a04304aPatch
→
https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9Product · Release Notes
→
https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8Product · Release Notes
→
https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735Exploit · Mitigation · Vendor Advisory
→
https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735Exploit · Mitigation · Vendor Advisory

Quick Facts

CVE IDCVE-2026-59879
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-190
CISA KEVNo
EPSS (30d)0.30%
Affected1 vendor(s)
PublishedJul 8, 2026

Related CVEs (CWE-190)

CVE-2026-20884
9.8
CVE-2026-40962
9.8
CVE-2026-24214
9.8
CVE-2026-24660
9.8
CVE-2026-30909
9.8
CVE-2026-24450
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-59879 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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