CVE-2026-29063

Immutable.js: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable

CVSS 8.7 HIGHEPSS 0.6%CWE-1321

Vexday Risk Score

21Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 8.7EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

06 mar 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Productos afectados

immutable-js · immutable-js

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Referencias

https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3 https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8 https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5 https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw