CVE-2026-2858

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.

CVSS v3 3.3 LOW
CVSS v2.0 1.7 LOW

3.3^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

1.7^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:S/C:N/I:N/A:P

Exploitability : 3.1 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:wren:wren:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-20 22:16

Updated : 2026-02-26 02:35

NVD link : CVE-2026-2858

Mitre link : CVE-2026-2858

CVE.ORG link : CVE-2026-2858

JSON object : View

Products Affected

wren

wren

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-125

Out-of-bounds Read

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