CVE-2026-102558
8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Summary
A flaw was found in libsoup. When max-incoming-payload-size is unlimited (0), SoupWebsocketConnection could grow its incoming GByteArray based on an attacker-controlled frame length until the length wrapped, causing a heap buffer overflow while reading frame data.
Affected Software
| Vendor | Product | Version Range | Status |
|---|
Weaknesses
- CWE-125: Out-of-bounds Read
Workarounds
To mitigate this configure a finite max-incoming-payload-size (do not set it to 0/unlimited) on SoupWebsocketConnection. Restrict WebSocket exposure to trusted peers.
References
- https://access.redhat.com/security/cve/CVE-2026-102558
- https://bugzilla.redhat.com/show_bug.cgi?id=2543274
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