CVE-2026-58303 Memory corruption in Escargot
A stack-based buffer overflow in the Escargot JavaScript engine allows attackers to execute arbitrary code or cause denial of service.
- 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-2026-58303?
CVE-2026-58303 is a medium-severity memory corruption vulnerability in Samsung Open Source Escargot, published on 9 Jul 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
Stack-based buffer overflow vulnerability in Samsung Open Source Escargot allows Overflow Buffers.
This issue affects Escargot: before b30b63fc63b403907d8137da1c65aaa4521fe74e.
Weakness: CWE-121
Which versions are affected by CVE-2026-58303?
How do I fix CVE-2026-58303?
No fix has been published for CVE-2026-58303 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-58303 being exploited?
There is no known exploitation of CVE-2026-58303 in the wild and no public exploit code.
Sources
Also known as GHSA-95xm-4789-hr5f.