CVE-2026-102559
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.
- Published Sep 29, 2026
- CVSS 8.6 high
- 0.3% chance of exploitation in the next 30 days (EPSS)