CVE-2026-47309 Denial of service in Escargot

Medium 5.5 Published 19 May 2026 Updated 19 May 2026

An attacker can cause a denial of service in applications using the Escargot JavaScript engine by providing oversized serialized data payloads.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-47309?

CVE-2026-47309 is a medium-severity denial of service vulnerability in Samsung Open Source Escargot, published on 19 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Uncontrolled Recursion vulnerability in Samsung Open Source Escargot allows Oversized Serialized Data Payloads.

This issue affects Escargot: 590345cc6258317c5da850d846ce6baaf2afc2d3.

Weakness: CWE-674

Which versions are affected by CVE-2026-47309?

It affects 1 product.

Products include Samsung Escargot.

How do I fix CVE-2026-47309?

No fix has been published for CVE-2026-47309 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-47309 being exploited?

There is no known exploitation of CVE-2026-47309 in the wild and no public exploit code.

Sources

Also known as GHSA-8r93-f22g-x9vj.