Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| immutable-js | immutable-js | < 4.3.9, >= 5.0.0-beta.1, < 5.1.8 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | node-immutable | 4.3.9-1 | — |
| Debian 13 | node-immutable | No fix yet | — |
| Debian 12 | node-immutable | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | node-immutable | No fix yet | — |
| Ubuntu 26.04 LTS | node-immutable | No fix yet | — |
| Ubuntu 25.10 | node-immutable | No fix yet | — |
| Ubuntu 24.04 LTS | node-immutable | No fix yet | — |
| Ubuntu 22.04 LTS | node-immutable | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | node-immutable | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | argo-workflows-ui-4.0 | 4.0.11-r0 | — |
| Wolfi rolling | nextcloud-server-33 | 33.0.7-r1 | — |
| Wolfi rolling | rancher-api-ui | 1.2.3-r9 | — |
| Wolfi rolling | vitess-23 | 23.0.5-r6 | — |
| Wolfi rolling | vitess-24 | 24.0.2-r7 | — |
| Wolfi rolling | vitess-24-compat | 24.0.3-r7 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | immutable | >= 4.0.0-beta.1, < 4.3.9 | 4.3.9 | GHSA-xvcm-6775-5m9r |
| npm | immutable | >= 5.0.0-beta.1, < 5.1.8 | 5.1.8 | GHSA-xvcm-6775-5m9r |
| npm | immutable | < 3.8.4 | 3.8.4 | GHSA-xvcm-6775-5m9r |
Advisories 4
- WID-SEC-2026-3376 Atlassian Bamboo, Bitbucket, Confluence, Fisheye/Crucible, Jira Software und Jira Service Management: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- WID-SEC-2026-2636 IBM Tivoli Netcool/OMNIbus (Immutable.js): Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 4, 2026
- WID-SEC-2026-3623 IBM DataPower Gateway: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- NCSC-2026-0431 Kwetsbaarheden verholpen in IBM DataPower Gateway en onderliggende componenten NCSC-NL (Netherlands) · Oct 16, 2026
References
- https://github.com/immutable-js/immutable-js/security/advisories/GHSA-xvcm-6775-5m9r
- https://github.com/immutable-js/immutable-js/commit/3dd7e5655012597a41873e328bf9142a8901527b
- https://github.com/immutable-js/immutable-js/commit/e51d49fc612ded5ec4dfb94ff294d22074269b0f
- https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9
- https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8