How serious is CVE-2026-3387?

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-2026-3387?

Yes, proof-of-concept exploit code for CVE-2026-3387 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-3387?

CVE-2026-3387 affects wren wren. Check the full CVE details for specific version information.

How do I fix CVE-2026-3387?

To remediate CVE-2026-3387, check for security patches from wren. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-3387

Medium

|4.8

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker with local access to crash the wren programming environment by causing a null pointer error when certain functions are called. It requires the attacker to have access to the system where wren is running, making it less of a threat for remote attacks but still a concern for local users.

Technical Description

A vulnerability has been found in wren-lang wren up to 0.4.0. Affected by this issue is the function getByteCountForArguments of the file src/vm/wren_compiler.c. Such manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. 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

wren

Product

wren

Related Vulnerabilities

CVE-2026-3386Medium

This vulnerability allows an attacker to read data outside the intended memory boundaries of the wren programming language, which could lead to sensitive information exposure or application crashes. The attack can be executed on the local host, and the issue has been publicly disclosed, but the developers have not yet addressed it.