NULL pointer dereference in Squirrel-Lang Squirrel
CVE-2026-3389
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (8.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Squirrel-Lang Squirrel
- Squirrel — versions 3.0, 3.1, 3.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/albertodemichelis/squirrel/issues/314 (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- github.com/oneafter/0122/blob/main/i314/repro (Exploit, exploit)
Frequently asked questions
- What is CVE-2026-3389?
- CVE-2026-3389 is a low-severity vulnerability in Squirrel-Lang Squirrel, classified under Improper Resource Shutdown or Release. CVSS score: 3.3/10. Published 2026-03-01.
- How severe is CVE-2026-3389?
- Low severity. CVSS v3 base score is 3.3 out of 10.