CVE-2026-2858

LOW 3.3

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

CVSS Score

3.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-125 CWE-119
Vendor	wren-lang
Product	wren
Published	Feb 20, 2026
Last Updated	Feb 24, 2026

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CVSS v3 Breakdown

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

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

wren-lang / wren

0.1 0.2 0.3 0.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.347097 vuldb.com: https://vuldb.com/?ctiid.347097 vuldb.com: https://vuldb.com/?submit.754489 github.com: https://github.com/wren-lang/wren/issues/1217 github.com: https://github.com/oneafter/0122/blob/main/i1217/repro github.com: https://github.com/wren-lang/wren/

Credits

🔍 Oneafter (VulDB User)