Bug 2521703 (CVE-2026-78161)

Summary:	CVE-2026-78161 libwebsockets: libwebsockets: Out-of-bounds write in LECP CBOR Recording
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	ansmith, anthomas, eglynn, ehelms, ggainey, jbritton, jjoyce, jpasqual, jpretori, jschluet, juwatts, lhh, mburns, mdellweg, mgarciac, mhulan, nmoumoul, osousa, pcreech, pjindal, rchan, smallamp, tmalecek
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in warmcat libwebsockets. A remote attacker could exploit an out-of-bounds write vulnerability in the LECP CBOR Recording component, specifically within the `report_raw_cbor` function. This could lead to information disclosure, data corruption, or denial of service.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-24 01:01:33 UTC

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.