CVE-2026-102559: Libsoup: libsoup: heap buffer overflow during websocket client-frame masking

Overview

Severity

High (CVSS 8.6)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-10-03

EPSS Score

0.30% (percentile: 20.6%)

Affected Products (1)

Other

• 21478-17084

Revision History

• 2026-10-03: Information published.