CVE-2026-2661
CWE-119Published: February 18, 2026· Updated: Feb 20, 2026
Official Description
A security flaw has been discovered in Squirrel up to 3.2. This affects the function SQObjectPtr::operator in the library squirrel/sqobject.h. The manipulation results in heap-based buffer overflow. The attack needs to be approached locally. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Technical Analysis
CVE-2026-2661 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A proof-of-concept (PoC) exploit exists for CVE-2026-2661. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.
From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (5)
Quick Facts
Related CVEs (CWE-119)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-2661 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts