CVE-2026-2858

low-risk
Published 2026-02-20

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.

Do I need to act?

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0.01% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.3/10 Low
LOCAL / LOW complexity

Affected Products (1)

Wren

Affected Vendors

Wren

References (6)

Issue Tracking https://github.com/oneafter/0122/blob/main/i1217/repro
Product https://github.com/wren-lang/wren/
Issue Tracking https://github.com/wren-lang/wren/issues/1217
Permissions Required https://vuldb.com/?ctiid.347097
Third Party Advisory https://vuldb.com/?id.347097
Third Party Advisory https://vuldb.com/?submit.754489
18
/ 100
low-risk
Severity 13/34 · Low
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal