CVE-2026-3387

wren-lang wren wren_compiler.c getByteCountForArguments null pointer dereference

MEDIUM
5.5
CVSS Score
Published: March 1, 2026 at 09:32 AM UTC
Updated: June 17, 2026 at 10:43 AM UTC
2 products affected across 2 vendorsWrenWren

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/?id.348273
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/?ctiid.348273
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/?submit.761312
Issue TrackingExploitVendor Advisory
Source: cverecord
https://github.com/wren-lang/wren/issues/1220
Product
Source: cverecord
https://github.com/wren-lang/wren/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-476CWE-404

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