Security Advisory

CVE-2026-12478

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-14 09:26:19

Last updated 2026-07-15 14:42:55

Assigner redhat

CVSS score not scored

State PUBLISHED

Description

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.

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