CVE-2026-102559

HighCVSS 8.6/10Last modified Oct 19, 2026

Description

A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow.

Metrics

CVSS 3.1 8.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Weakness enumeration

CWE-125

Affected software

No affected versions have been published.

Timeline

Published: Sep 29, 2026
Last modified: Oct 19, 2026
NVD status: Modified

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