CVE-2026-102559 — Libsoup: libsoup: heap buffer overflow during websocket client-frame masking
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 trunc…
Published: 2026-09-29 · CVSS: 8.6 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7