CVE-2026-78161: Warmcat Libwebsockets

High severity, CVSS 7.3. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability was found in warmcat libwebsockets 4.5.0. Impacted is the function report_raw_cbor of the file lib/misc/lecp.c of the component LECP CBOR Recording. The manipulation results in out-of-bounds write. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as 1d44554a1bb262db63ff4e240152a9deecd99054. It is best practice to apply a patch to resolve this issue.

Affected products

• Warmcat Libwebsockets: version 4.5.0 only

Published 2026-08-24. Last modified 2026-08-24.