How serious is CVE-2026-3389?

This vulnerability has a CVSS score of 4.8 out of 10, classified as MEDIUM severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-3389?

Yes, proof-of-concept exploit code for CVE-2026-3389 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-3389?

CVE-2026-3389 affects squirrel-lang squirrel. Check the full CVE details for specific version information.

How do I fix CVE-2026-3389?

To remediate CVE-2026-3389, check for security patches from squirrel-lang. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-3389

Medium

|4.8

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to crash the Squirrel application by triggering a null pointer dereference, which can lead to unexpected behavior or denial of service. However, the attacker must have local access to the system to exploit this issue.

Technical 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 Analysis

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

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

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$638($500-$1K)

Vendor Response

Grade APatched in 3 days

Quick Information

Published

Mar 1, 2026

about 1 month ago

Last Modified

Mar 5, 2026

about 1 month ago

Vendor

squirrel-lang

Product

squirrel

Related Vulnerabilities

CVE-2026-3388Medium

This vulnerability allows an attacker to cause a program crash by triggering uncontrolled recursion in the Squirrel language, which could lead to a denial of service. The attack must be executed locally, meaning the attacker needs access to the system where Squirrel is running.