Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, Immutable.Map and Immutable.Set keep keys that share the same 32-bit hash in a HashCollisionNode collision bucket that is scanned linearly, allowing an attacker who controls keys inserted into a Map, such as through Immutable.Map(obj), Immutable.fromJS(obj), state.merge(userObject), or mergeDeep, to craft many colliding keys and degrade insertion and lookup to consume disproportionate CPU. This issue is fixed in versions 4.3.9 and 5.1.8.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, Immutable.Map
    and Immutable.Set keep keys that share the same 32-bit hash in a HashCollisionNode collision bucket that
    is scanned linearly, allowing an attacker who controls keys inserted into a Map, such as through
    Immutable.Map(obj), Immutable.fromJS(obj), state.merge(userObject), or mergeDeep, to craft many colliding
    keys and degrade insertion and lookup to consume disproportionate CPU. This issue is fixed in versions
    4.3.9 and 5.1.8. (CVE-2026-59880)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, Immutable.Map     and Immutable.Set keep keys that share the same 32-bit hash in a HashCollisionNode collision bucket that     is scanned linearly, allowing an attacker who controls keys inserted into a Map, such as through     Immutable.Map(obj), Immutable.fromJS(obj), state.merge(userObject), or mergeDeep, to craft many colliding     keys and degrade insertion and lookup to consume disproportionate CPU. This issue is fixed in versions     4.3.9 and 5.1.8. (CVE-2026-59880)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
445101	SCA: security update for immutable (GHSA-xvcm-6775-5m9r)	Tenable Cloud Security	SCA Checks	high
445101	SCA: security update for immutable (GHSA-xvcm-6775-5m9r)	Tenable Self-Hosted Container Security	SCA Checks	high
328696	Linux Distros Unpatched Vulnerability : CVE-2026-59880	Nessus	Misc.	high

Detections

Analytics

CVE-2026-59880

high

Tenable Plugins

high

high

high