wren-lang wren up to 0.4.0 src/vm/wren_compiler.c getByteCountForArguments null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in wren-lang wren up to 0.4.0. This affects the function getByteCountForArguments of the file src/vm/wren_compiler.c. Performing a manipulation results in null pointer dereference. This vulnerability was named CVE-2026-3387. The attack needs to be approached locally. In addition, an exploit is available. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability classified as problematic has been found in wren-lang wren up to 0.4.0. This affects the function getByteCountForArguments of the file src/vm/wren_compiler.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-3387. The exploitability is told to be easy. An attack has to be approached locally. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-9122). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

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Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 3.3
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/28/2026 Advisory disclosed
02/28/2026 +0 days VulDB entry created
03/05/2026 +5 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 1220
Status: Not defined

CVE: CVE-2026-3387 (🔒)
GCVE (CVE): GCVE-0-2026-3387
GCVE (VulDB): GCVE-100-348273
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/28/2026 15:55
Updated: 03/05/2026 03:02
Changes: 02/28/2026 15:55 (57), 03/01/2026 19:27 (30), 03/01/2026 21:10 (1), 03/03/2026 22:45 (1), 03/05/2026 03:02 (11)
Complete: 🔍
Submitter: Oneafter
Cache ID: 216:C57:103

Submitinfo

Accepted

  • Submit #761312: wren-lang wren main-branch NULL Pointer Dereference (by Oneafter)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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