CVE-2026-3387 MEDIUM

CVE-2026-3387: wren-lang wren wren_compiler.c getByteCountForArguments null pointer dereference

Vendor Wren-Lang
Product wren
Weakness CWE-476
Published March 1, 2026
Last update March 2, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 1, 2026 CVE published
March 2, 2026 Record updated