CVE-2026-2858

Name: CVE-2026-2858
Creator: NVD / NIST
Published: 2026-02-20T22:16:30+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 1.9/10EPSS 0.12%

Last modified Jun 17, 2026

CVE-2026-2858 is a low-severity vulnerability rated 1.9/10 on the CVSS scale. 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. EPSS estimates a 0.12% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS 4.0

1.9/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.12%

2.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wren	Wren	<= 0.4.0

References

https://github.com/oneafter/0122/blob/main/i1217/reproIssue Tracking, Product
https://github.com/wren-lang/wren/Product
https://github.com/wren-lang/wren/issues/1217Issue Tracking
https://vuldb.com/?ctiid.347097Permissions Required, VDB Entry
https://vuldb.com/?id.347097Third Party Advisory, VDB Entry
https://vuldb.com/?submit.754489Third Party Advisory, VDB Entry

Timeline

Published: Feb 20, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-2858?

How severe is CVE-2026-2858?

CVE-2026-2858 has a CVSS score of 1.9/10 (LOW severity). The EPSS model estimates a 0.12% probability of exploitation in the next 30 days.

How do I fix CVE-2026-2858?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-2858?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST