lxsmnsyc Seroval up to 1.6.2 Deserialization deserializeTypedArray byteLength allocation of resources

Summaryinfo

A vulnerability was found in lxsmnsyc Seroval up to 1.6.2. It has been rated as problematic. Affected by this issue is the function deserializeTypedArray of the component Deserialization. This manipulation of the argument byteLength causes allocation of resources. This vulnerability is handled as CVE-2026-104845. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in lxsmnsyc Seroval up to 1.6.2. It has been declared as problematic. Affected by this vulnerability is the function deserializeTypedArray of the component Deserialization. The manipulation of the argument byteLength with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

Seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.3, deserializeTypedArray in fromJSON and fromCrossJSON trusts a deserialized source value as an ArrayBuffer and does not bound the serialized element count. An attacker can provide a small untrusted JSON object with a large length value, causing the array-like TypedArray constructor to synchronously allocate the selected number of elements and exhaust CPU or memory while starving the event loop. The offset check does not reject the crafted source because source.byteLength is undefined. DataView reaches a similar unchecked cast but throws rather than allocating, and the issue has no identified confidentiality or integrity impact. This issue is fixed in version 1.6.3.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-104845 since 10/02/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.6.3 eliminates this vulnerability.

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Productinfo

Vendor

• lxsmnsyc

Name

• Seroval

Version

• 1.6.0
• 1.6.1
• 1.6.2

Website

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

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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