QwikSec

Security Database

CVE

CWE

Training

CVE-2026-2858

Published: Feb 20, 2026

Modified: Feb 24, 2026

PUBLISHED

CVSS v3.1

3.3

LOW

Description

A vulnerability was identified in wren-lang wren up to 0.4.0. This affects the function peekChar of the file src/vm/wren_compiler.c of the component Source File Parser. Such manipulation leads to out-of-bounds read. The attack needs to be performed locally. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.

Vendor	Product	Versions
wren-lang	wren	affected `0.1` affected `0.2` affected `0.3` affected `0.4.0`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

VDB-347097 | wren-lang wren Source File wren_compiler.c peekChar out-of-bounds

vdb-entry

technical-description

VDB-347097 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

Submit #754489 | wren-lang wren main-branch Heap-based Buffer Overflow

third-party-advisory

https://github.com/wren-lang/wren/issues/1217

issue-tracking

https://github.com/oneafter/0122/blob/main/i1217/repro

exploit

https://github.com/wren-lang/wren/

product

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.