CVE-2026-104846

Seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. From 0.12.0 until 1.6.2, fromJSON deserialization of a fulfilled Promise control node can pass a plugin-produced callable-bearing thenable to a native Promise resolver. ECMAScript thenable assimilation then invokes the callable unexpectedly, allowing attacker-controlled JSON to trigger code in applications using plugin-capable Seroval releases. This path bypasses the Promise resolver type-confusion remediation in version 1.5.3 for CVE-2026-59940 because the unexpected invocation occurs through native Promise settlement after the referenced value is deserialized. This issue is fixed in version 1.6.2.

• CWE-843

• https://github.com/lxsmnsyc/seroval/commit/f1ffcc96d259f9b5b3d71feb262b58240c90e7b7
• https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-p6vx-979v-rg4c

Published

Oct 2, 2026

Last Modified

Oct 2, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-104721Path-traversal vulnerability in QOS.CH Sarl Logback-classic …6.3
• CVE-2026-104733User Impersonation in ProcessOnes XMMP Server ejabberd <= 26…7.4
• CVE-2026-1048A weakness has been identified in LigeroSmart up to 6.1.26. …5.4
• CVE-2026-104843uv is a Python package and project manager written in Rust. …5.9
• CVE-2026-104844PostCSS Selector Parser is a CSS selector parser that integr…5.9
• CVE-2026-104845Seroval facilitates JS value stringification, including comp…7.5
• CVE-2026-104847ProseMirror's view component renders and manages the editabl…8.5
• CVE-2026-104848Tinypool is a minimal Node.js worker thread pool implementat…9.5
• CVE-2026-104849Tinypool is a minimal Node.js worker thread pool implementat…9.5
• CVE-2026-104851fsspec is a specification and Python implementation framewor…8.8
• CVE-2026-104853Nx is a monorepo solution for TypeScript and polyglot codeba…5.8
• CVE-2026-104854Nx is a monorepo solution for TypeScript and polyglot codeba…8.5