CVE-2026-78161

High

Description

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.

SeverityHigh

CVSS7.3

Exploit probability—

ProductWarmcat Libwebsockets

PublishedAug 24, 2026

First seenAug 24, 2026

Weakness typeCWE-787Out-of-bounds write CWE-119Memory buffer bounds error

How to fix

Patches

github.com/warmcat/libwebsockets/commit/1d44554a1bb262db63ff4e240152a9deecd99054

Affected products

Product	Affected versions	Fixed in
warmcat libwebsockets	4.5.0	—

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