PT-2026-56021 · Mrubyc · Mrubyc

CVE-2026-38973

Published

2026-07-06

Updated

2026-07-09

CVSS v3.1

4.4

Medium

Vector

AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

Name of the Vulnerable Software and Affected Versions mrubyc versions prior to 3.4.2

Description An out-of-bounds read occurs during the builtin missing-method lookup within the mrbc find method() function.

Recommendations Update to a version newer than 3.4.1. As a temporary mitigation, restrict the use of the mrbc find method() function.

Exploit

Fix

Out of bounds Read

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CVE-2026-38973

Mrubyc