Medium severity · published Mar 1, 2026
CVE-2026-3389
Squirrel sqstdrex.cpp sqstd_rex_newnode null pointer dereference
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
A vulnerability was determined in Squirrel up to 3.2. This vulnerability affects the function sqstd_rex_newnode in the library sqstdlib/sqstdrex.cpp. Executing a manipulation can lead to null pointer dereference. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. 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:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SQ
Squirrel ·
3.0; 3.1; 3.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3389
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3389
Exploit
https://github.com/albertodemichelis/squirrel/issues/314
Exploit
https://github.com/oneafter/0122/blob/main/i314/repro
Permissions Required
https://vuldb.com/?ctiid.348275
Third Party Advisory
https://vuldb.com/?id.348275
Third Party Advisory
https://vuldb.com/?submit.761315
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