CVE-2026-9541
Squirrel Cnut File sqobject.cpp ReadObject heap-based overflow
Description
A security flaw has been discovered in Squirrel up to 3.2. Impacted is the function ReadObject of the file squirrel/sqobject.cpp of the component Cnut File Handler. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. 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.
INFO
Published Date :
May 26, 2026, 2:16 p.m.
Last Modified :
May 27, 2026, 6:48 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-9541
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update Squirrel to a version that fixes the buffer overflow.
- Apply vendor patches for Squirrel.
- Restrict local access to the affected component.
- Review Squirrel's file handling security.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-9541.
| URL | Resource |
|---|---|
| https://github.com/albertodemichelis/squirrel/issues/327 | Exploit Issue Tracking Mitigation Patch |
| https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oob | Exploit |
| https://vuldb.com/submit/814826 | Third Party Advisory VDB Entry Exploit |
| https://vuldb.com/vuln/365602 | Third Party Advisory VDB Entry |
| https://vuldb.com/vuln/365602/cti | Permissions Required VDB Entry |
| https://github.com/albertodemichelis/squirrel/issues/327 | Exploit Issue Tracking Mitigation Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-9541 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-9541
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-9541 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-9541 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Added CPE Configuration OR *cpe:2.3:a:squirrel-lang:squirrel:*:*:*:*:*:*:*:* versions up to (including) 3.2 Added Reference Type CISA-ADP: https://github.com/albertodemichelis/squirrel/issues/327 Types: Exploit, Issue Tracking, Mitigation, Patch Added Reference Type VulDB: https://github.com/albertodemichelis/squirrel/issues/327 Types: Exploit, Issue Tracking, Mitigation, Patch Added Reference Type VulDB: https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oob Types: Exploit Added Reference Type VulDB: https://vuldb.com/submit/814826 Types: Exploit, Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/vuln/365602 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/vuln/365602/cti Types: Permissions Required, VDB Entry -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 26, 2026
Action Type Old Value New Value Added Reference https://github.com/albertodemichelis/squirrel/issues/327 -
New CVE Received by [email protected]
May. 26, 2026
Action Type Old Value New Value Added Description A security flaw has been discovered in Squirrel up to 3.2. Impacted is the function ReadObject of the file squirrel/sqobject.cpp of the component Cnut File Handler. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. 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. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Added CVSS V2 (AV:L/AC:L/Au:S/C:P/I:P/A:P) Added CWE CWE-119 Added CWE CWE-122 Added Reference https://github.com/albertodemichelis/squirrel/issues/327 Added Reference https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oob Added Reference https://vuldb.com/submit/814826 Added Reference https://vuldb.com/vuln/365602 Added Reference https://vuldb.com/vuln/365602/cti