CVE-2026-3387

Name: CVE-2026-3387
Creator: NVD / NIST
Published: 2026-03-01T10:16:00.863+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 1.9/10EPSS 0.16%

Last modified Jun 17, 2026

CVE-2026-3387 is a low-severity vulnerability rated 1.9/10 on the CVSS scale. 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. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

1.9/10

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 Probability

0.16%

5.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wren	Wren	<= 0.4.0

References

https://github.com/oneafter/0122/blob/main/i1220/reproExploit
https://github.com/wren-lang/wren/Product
https://github.com/wren-lang/wren/issues/1220Exploit, Issue Tracking, Vendor Advisory
https://vuldb.com/?ctiid.348273Permissions Required, VDB Entry
https://vuldb.com/?id.348273Third Party Advisory, VDB Entry
https://vuldb.com/?submit.761312Third Party Advisory, VDB Entry

Timeline

Published: Mar 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-3387?

How severe is CVE-2026-3387?

CVE-2026-3387 has a CVSS score of 1.9/10 (LOW severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.

How do I fix CVE-2026-3387?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-3387?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST