Libsoup: libsoup: heap buffer overflow during websocket client-frame masking
Historical advisory recorded 2 Nov 2026 09:57:17 UTC. Read the latest advisory.
cve-program · CVE-2026-102559
PublishedA 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.
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cve-program · CVE-2026-102559
PublishedLibsoup: 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 truncated while the masking routine still used the full length, causing a heap buffer overflow.
- Source published
- 29 Sep 2026 17:15:34 UTC
- Source modified
- 2 Nov 2026 09:00:49 UTC
- Saved here
- 2 Nov 2026 09:57:17 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H