{"id":"CVE-2026-102559","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-102559","summary":"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…","details":"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":"2026-09-29T18:17:08.503","modified":"2026-09-30T21:17:04.667","cvss":{"score":8.6,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-102559"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543285"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-30T21:17:04.667"}}