Medium severity · published May 26, 2026
CVE-2026-9541
Squirrel Cnut File sqobject.cpp ReadObject heap-based overflow
5.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SQ
Squirrel · Squirrel
3.0; 3.1; 3.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9541
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9541
Exploit
https://github.com/albertodemichelis/squirrel/issues/327
Exploit
https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oob
Exploit
https://vuldb.com/submit/814826
Third Party Advisory
https://vuldb.com/vuln/365602
Permissions Required
https://vuldb.com/vuln/365602/cti
