CVE-2026-59879
7.5 · HIGHOverview
CVE-2026-59879 is a high-severity vulnerability affecting immutable-js immutable. It was published on July 8, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from immutable-js. Update immutable to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| immutable-js | immutable | >= 0, < 4.3.9 | Affected |
References
Frequently Asked Questions
What is CVE-2026-59879?
CVE-2026-59879 is a high-severity vulnerability affecting immutable-js immutable. It was published on July 8, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-59879?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-59879?
Check the references section for vendor advisories and patches from immutable-js. Update immutable to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-59879?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-59879 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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