CVE-2026-102557
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 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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|
Weaknesses
- CWE-125: Out-of-bounds Read
Workarounds
To mitigate this set a conservative max-total-incoming-message-size / incoming payload limits where the API allows, and do not accept WebSocket connections from untrusted peers.
References
- https://access.redhat.com/security/cve/CVE-2026-102557
- https://bugzilla.redhat.com/show_bug.cgi?id=2543231
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