CVE-2026-23736
Unknown Unknown - Not Provided
Prototype Pollution in seroval JSON Deserialization Prior to

Publication date: 2026-01-21

Last updated on: 2026-02-27

Assigner: GitHub, Inc.

Description
seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-01-21
Last Modified
2026-02-27
Generated
2026-06-16
AI Q&A
2026-01-22
EPSS Evaluated
2026-06-14
NVD
CVE-2026-23736
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
lxsmnsyc seroval to 1.4.1 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-1321 The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability exists in seroval versions 1.4.0 and below, where improper input validation allows a malicious object key to cause prototype pollution during JSON deserialization. Prototype pollution can alter the behavior of JavaScript objects by modifying their prototype chain, potentially leading to unexpected behavior or security issues. The vulnerability affects only the JSON deserialization functionality and is fixed in version 1.4.1.

Impact Analysis

The vulnerability can lead to prototype pollution, which may allow an attacker to manipulate the behavior of JavaScript objects during JSON deserialization. This can result in data corruption, unauthorized access, or other security impacts such as confidentiality, integrity, and availability loss, as indicated by the CVSS score.

Mitigation Strategies

Upgrade seroval to version 1.4.1 or later, as this version contains the fix for the prototype pollution vulnerability during JSON deserialization.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-23736. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart