CVE-2026-59879Medium· 5.3▾ SunlitA flaw was found in Immutable.js, a library providing persistent immutable data structures. This vulnerability occurs when specific List operations, such as List#set or List#setSize, are provided with an index or size value within a partic…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 1.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.4%
0.4% → 0.7%
7.5 → 5.3
high → medium
Last analysed / modified upstream
A flaw was found in Immutable.js, a library providing persistent immutable data structures. This vulnerability occurs when specific List operations, such as List#set or List#setSize, are provided with an index or size value within a particular large range. An attacker could exploit this by providing specially crafted input, leading to an uncatchable infinite loop or unbounded memory allocation, ultimately causing a Denial of Service (DoS) for applications using the library.
immutable-js: Immutable.js: Denial of Service due to mishandling of large index values in List operations — rated Moderate by Red Hat. Released 2026-07-08, updated 2026-10-15.
Affected:
Fixed:
No fix planned:
Not affected:
Before applying this update, make sure all previously released errata relevant to your system have been applied.
For detailed instructions how to apply this update, refer to:
https://docs.redhat.com/en/documentation/red_hat_satellite/6.19/html/updating_red_hat_satellite/index https://access.redhat.com/errata/RHSA-2026:74503 Before you apply this update, make sure all previously released errata that are relevant to your system are applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:67539 For more about Ansible plugins for Red Hat Developer Hub, see References links https://access.redhat.com/errata/RHSA-2026:72712
Workarounds / mitigations:
--max-old-space-size) can contain the impact of a potential process abort.Affected packages:
immutable >= 5.0.0-beta.1, < 5.1.8immutable >= 4.0.0-rc.1, < 4.3.9immutable < 3.8.4Patched in:
immutable 5.1.8immutable 4.3.9immutable 3.8.4Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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