CVE catalog
CVE-2026-59880
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 bu
- Severity
- High · CVSS 8.7
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.66% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | node-immutable | sid | 5.1.9-1 | fixed |
| Debian | node-immutable | forky | 5.1.9-1 | fixed |
| Debian | node-immutable | trixie | 4.3.4-1 | vulnerable |
| Debian | node-immutable | bookworm | 4.1.0-3 | vulnerable |
| Cpe | node-immutable | Not reported | Not reported | vulnerable |
| Cpe | immutable | Not reported | 4.3.9 | fixed |
| Cpe | immutable | Not reported | 5.1.8 | fixed |
| Npm | immutable | Not reported | 3.8.4 | fixed |
| Npm | immutable | Not reported | 5.1.8 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | node-immutable | source | sid | 4.3.9-1 | not yet assigned | Not reported | [1141821] |
| Debian | node-immutable | source | forky | 4.3.9-1 | not yet assigned | Not reported | [1141821] |
| Debian | node-immutable | source | trixie | (unfixed) | not yet assigned | Not reported | [1141821] |
| Debian | node-immutable | source | bookworm | (unfixed) | not yet assigned | Not reported | [1141821] |
| Cpe | immutable | cpe | Not reported | 4.3.9 | Not reported | Not reported | Not reported |
| Cpe | immutable | cpe | Not reported | 5.1.8 | Not reported | Not reported | Not reported |
| Npm | immutable | npm | Not reported | 3.8.4 | Not reported | GHSA-XVCM-6775-5M9R | Not reported |
| Npm | immutable | npm | Not reported | 5.1.8 | Not reported | Not reported | Not reported |
Notes
[trixie] node-immutable: Minor issue [bookworm] node-immutable: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [node-immutable]Affected
Details (2)
4.1.0-3· all · bookwormAffected
nvd · node-immutable · debian · bookworm; nvd · node-immutable · debian · 12
4.1.0-3· all · bookwormAffected
nvd · node-immutable · debian · bookworm; nvd · node-immutable · debian · 12
[Debian 13 (Trixie)]
- [node-immutable]Affected
Details (2)
4.3.4-1· all · trixieAffected
nvd · node-immutable · debian · 13
4.3.4-1· all · trixieAffected
nvd · node-immutable · debian · 13
Observed:
References
- [https://github.com/advisories/GHSA-xvcm-6775-5m9r]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-59880]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-59880]
- [https://security-tracker.debian.org/tracker/CVE-2026-59880]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2636.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]