CVE-2026-86315 Integer overflow in Escargot
An attacker can crash the host process or potentially execute code by supplying crafted JavaScript that triggers an out-of-bounds write via integer truncation in the Escargot engine.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86315?
CVE-2026-86315 is a medium-severity vulnerability in Samsung Opensource Escargot, published on 7 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An out-of-bounds write caused by numeric truncation Samsung Open Source Escargot on Linux x86-64 allows an attacker who can supply JavaScript for execution to corrupt native memory and crash the host process via a crafted class definition whose instance initialization entry count exceeds UINT16_MAX.
This issue affects Escargot: 5dc93606abd42b859045add05d704a038e197359.
Weakness: CWE-197
Which versions are affected by CVE-2026-86315?
How do I fix CVE-2026-86315?
No fix has been published for CVE-2026-86315 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-86315 being exploited?
There is no known exploitation of CVE-2026-86315 in the wild and no public exploit code.
Sources
Also known as GHSA-xh23-cpx8-xqgm.