Which versions of Squirrel are affected by CVE-2026-3389?

CVE-2026-3389 is a low-severity vulnerability in Squirrel (CVSS 3.3). The limited severity suggests constrained impact, typically requiring specific conditions or local access for exploitation.

Is there a public PoC exploit available for CVE-2026-3389?

Yes, a public proof-of-concept exploit is available for CVE-2026-3389. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-3389?

During next maintenance window: Apply vendor patches when convenient. Monitor vendor channels for updates.

Squirrel CVE-2026-3389

Q: What is the CVSS score of CVE-2026-3389?

CVE-2026-3389 has a CVSS 4.0 base score of 1.9 (Low). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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. EPSS exploitation probability: 0.0%.

LOW

Improper Resource Shutdown or Release (CWE-404)

2026-03-01 cna@vuldb.com

Denial Of Service Squirrel

1.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

1.9 LOW

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

3.3 (LOW) 1.9 (LOW)

Analysis Generated

Mar 12, 2026 - 22:05 vuln.today

PoC Detected

Mar 05, 2026 - 01:42 vuln.today

Public exploit code

CVE Published

Mar 01, 2026 - 10:16 nvd

LOW 3.3

DescriptionCVE.org

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.

AnalysisAI

A vulnerability was determined in Squirrel up to 3.2. This vulnerability affects the function sqstd_rex_newnode in the library sqstdlib/sqstdrex.cpp. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 3.3 (LOW). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to null pointer dereference.
Remediation	Monitor vendor advisories for a patch. Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

During next maintenance window: Apply vendor patches when convenient. …

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CVE-2026-3389 vulnerability details – vuln.today

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