Uncontrolled Recursion in Wren Language Compiler by Wren-lang
CVE-2026-3385

4.8MEDIUM

Key Information:

Vendor

Wren-lang

Status
Wren
Vendor
CVE Published:
1 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3385?

A vulnerability exists in the Wren Language up to version 0.4.0, specifically within the 'resolveLocal' function found in the file 'src/vm/wren_compiler.c'. This flaw allows for uncontrolled recursion during local function resolution, which can lead to program instability and potential exploitation. While local access is required to trigger the vulnerability, the exploit is now publicly available, putting systems at risk. The issue was reported to the Wren-lang team, but no public acknowledgment or countermeasure has been issued yet.

Affected Version(s)

wren 0.1

wren 0.2

wren 0.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-3385 - Proof of Concept

References

https://vuldb.com/?id.348271
vdb-entrytechnical-description
https://vuldb.com/?ctiid.348271
signaturepermissions-required
https://vuldb.com/?submit.761305
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oneafter (VulDB User)
.