🛡️ CVE-2026-2858 — wren

🟢 CVSS 3.3 — Low ✅ No Known Exploit CWE-119 NVD
3.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability low.

Weakness class

CVE-2026-2858 is classified as CWE-119: Improper Restriction of Operations within Memory Buffer Bounds. A read or write is performed without confirming it stays inside the allocated buffer, corrupting adjacent memory.

Affected software

CVE-2026-2858 is recorded against 1 package.

  • wren (fixed in 0.4.0)

Timeline and source

Published on 20 February 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
github.com
github.com
vuldb.com
vuldb.com
vuldb.com

Details

Severity LOW
CVSS Score 3.3
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE CWE-119
Public Exploit ✅ No
Source NVD
Published 2026-02-20
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
wren — 0.4.0

References

Permissions Required, VDB Entry https://vuldb.com/?ctiid.347097
Third Party Advisory, VDB Entry https://vuldb.com/?id.347097
Third Party Advisory, VDB Entry https://vuldb.com/?submit.754489

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