Libsoup: libsoup: heap buffer overflow during websocket message reassembly
Historical advisory recorded 4 Nov 2026 22:54:02 UTC. Read the latest advisory.
cve-program · CVE-2026-102557
PublishedA flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash.
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cve-program · CVE-2026-102557
PublishedLibsoup: libsoup: heap buffer overflow during websocket message reassembly
A flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash.
- Source published
- 29 Sep 2026 16:11:57 UTC
- Source modified
- 4 Nov 2026 21:44:30 UTC
- Saved here
- 4 Nov 2026 22:54:02 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