lxsmnsyc Seroval up to 1.6.7 JSON Decoder fromJSON/fromCrossJSON allocation of resources

Summaryinfo

A vulnerability identified as problematic has been detected in lxsmnsyc Seroval up to 1.6.7. This affects the function fromJSON/fromCrossJSON of the component JSON Decoder. Performing a manipulation results in allocation of resources. This vulnerability is reported as CVE-2026-116584. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in lxsmnsyc Seroval up to 1.6.7. It has been classified as problematic. This affects the function fromJSON/fromCrossJSON of the component JSON Decoder. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. The summary by CVE is:

Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. From 1.4.1 until 1.6.8, fromJSON and fromCrossJSON do not require an array node's element list to be an actual array. A small crafted payload can supply an attacker-controlled length that determines memory allocation and decoder iterations independently of payload size, allowing an unauthenticated request to exhaust the process or block its thread. This issue is a residual bypass of the remediation for CVE-2026-23957. This issue is fixed in version 1.6.8.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-116584 since 10/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 1.6.8 eliminates this vulnerability.

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Productinfo

Vendor

• lxsmnsyc

Name

• Seroval

Version

• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7

Website

• Product: https://github.com/lxsmnsyc/seroval/

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