CVE-2026-8261 Squirrel sqobject.cpp Load heap-based overflow
A heap-based buffer overflow in the Squirrel library allows local attackers to execute arbitrary code or cause denial of service via crafted input.
- 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-2026-8261?
CVE-2026-8261 is a medium-severity memory corruption vulnerability in Squirrel, published on 11 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was determined in Squirrel up to 3.2. This affects the function SQFunctionProto::Load of the file squirrel/sqobject.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-8261?
How do I fix CVE-2026-8261?
No fix has been published for CVE-2026-8261 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-2026-8261 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8261 exists.
Sources
Also known as DEBIAN-CVE-2026-8261, GHSA-r4m3-922m-v5vr, UBUNTU-CVE-2026-8261.