Squirrel up to 3.2 squirrel/sqobject.h SQObjectPtr::operator heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Squirrel up to 3.2. This vulnerability affects the function SQObjectPtr::operator in the library squirrel/sqobject.h. This manipulation causes heap-based overflow. The identification of this vulnerability is CVE-2026-2661. The attack can only be executed locally. Furthermore, there is an exploit available. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability has been found in Squirrel up to 3.2 and classified as problematic. Affected by this vulnerability is the function SQObjectPtr::operator in the library squirrel/sqobject.h. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect availability.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-2661. The exploitation appears to be easy. Attacking locally is a requirement. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet. The vulnerability scanner Nessus provides a plugin with the ID 299487 (Linux Distros Unpatched Vulnerability : CVE-2026-2661), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (299487). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CNA Base Score: 3.3
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 299487
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-2661

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/18/2026 Advisory disclosed
02/18/2026 +0 days VulDB entry created
02/21/2026 +3 days VulDB entry last update

Sourcesinfo

Advisory: 310
Status: Not defined

CVE: CVE-2026-2661 (🔒)
GCVE (CVE): GCVE-0-2026-2661
GCVE (VulDB): GCVE-100-346459
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/18/2026 08:36
Updated: 02/21/2026 19:31
Changes: 02/18/2026 08:36 (56), 02/20/2026 00:09 (2), 02/21/2026 19:31 (41)
Complete: 🔍
Submitter: Oneafter
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #753165: albertodemichelis squirrel master-branch Heap-based Buffer Overflow (by Oneafter)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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