Heap-Based Buffer Overflow in Squirrel Product by Squirrel Team
CVE-2026-8261

5.1MEDIUM

Key Information:

Vendor

Squirrel Team

Status
Squirrel
Vendor
CVE Published:
11 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8261?

A vulnerability affecting Squirrel versions up to 3.2 is identified, stemming from issues in the SQFunctionProto::Load function located in the squirrel/sqobject.cpp file. This vulnerability enables a heap-based buffer overflow, which can be triggered through local execution. Publicly disclosed exploits are available, and despite early notification through an issue report, the response from the project team remains pending.

Affected Version(s)

Squirrel 3.0

Squirrel 3.1

Squirrel 3.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-8261 - Proof of Concept

References

https://vuldb.com/vuln/362558
vdb-entrytechnical-description
https://vuldb.com/vuln/362558/cti
signaturepermissions-required
https://vuldb.com/submit/809904
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

biniam (VulDB User)
VulDB CNA Team
.