CVE-2026-12478 (GCVE-0-2026-12478)

Vulnerability from cvelistv5 – Published: 2026-07-14 09:26 – Updated: 2026-09-16 08:01
VLAI
Title
Libsoup: incomplete fix for cve-2026-0716: out-of-bounds read in libsoup websocket frame processing (unmasked path)
Summary
The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-based client when max_incoming_payload_size is set to 0.
Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 14:42 UTC
CWE
Assigner
References
Impacted products
Date Public
2026-04-27 00:00
Credits
Red Hat would like to thank Adel Bouachraoui and Gerard Capdevila for reporting this issue.
Show details on NVD website
To clipboard 

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