CVE-2026-57075: YAML::Syck versions before 1.47 for Perl allow an out-of-bounds read via a signed-char lookup-table index in syck_base64dec

Overview

Severity

Critical (CVSS 9.1)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-10-21

EPSS Score

0.63% (percentile: 49.6%)

Affected Products (1)

Other

• 0-17084

Revision History

• 2026-10-21: Information published.