Null Pointer Dereference Vulnerability in Squirrel by Squirrel
CVE-2026-3389

4.8MEDIUM

Key Information:

Vendor

Squirrel

Status
Squirrel
Vendor
CVE Published:
1 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3389?

A local null pointer dereference vulnerability has been identified in Squirrel versions up to 3.2. This issue specifically affects the function sqstd_rex_newnode within the sqstdlib/sqstdrex.cpp library. An attacker can exploit this vulnerability through manipulation, resulting in a null pointer dereference, which can lead to unexpected behavior and potential application crashes. Although this vulnerability has been publicly disclosed, the response from the project has been minimal following initial reports.

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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-2026-3389 - Proof of Concept

References

https://vuldb.com/?id.348275
vdb-entrytechnical-description
https://vuldb.com/?ctiid.348275
signaturepermissions-required
https://vuldb.com/?submit.761315
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
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

Oneafter (VulDB User)
JSON
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