Immutable.js up to 4.3.8/5.1.7 setListBounds src/List.js infinite loop

Summaryinfo

A vulnerability, which was classified as problematic, was found in Immutable.js up to 4.3.8/5.1.7. This impacts the function setListBounds of the file src/List.js of the component setListBounds. Executing a manipulation can lead to infinite loop. The identification of this vulnerability is CVE-2026-59879. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Immutable.js up to 4.3.8/5.1.7 and classified as problematic. This vulnerability affects the function setListBounds of the file src/List.js of the component setListBounds. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. CVE summarizes:

Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, List#set, List#setSize, List#setIn, List#updateIn, and the functional set, setIn, and updateIn mishandle an index or size in the range 2 ** 30 to 2 ** 31 in setListBounds in src/List.js, causing an empty List to enter an uncatchable infinite loop, a populated List to allocate without bound until process abort, or setSize to silently wrap large values. This issue is fixed in versions 4.3.9 and 5.1.8.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-59879 since 07/07/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 4.3.9 or 5.1.8 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• JavaScript Library

Name

• Immutable.js

Version

• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.3.5
• 4.3.6
• 4.3.7
• 4.3.8
• 5.1.0
• 5.1.1
• 5.1.2
• 5.1.3
• 5.1.4
• 5.1.5
• 5.1.6
• 5.1.7

CPE 2.3info

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CPE 2.2info

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