CVE-2026-78161

EUVD-2026-64685
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.3 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 32.6%
Debian logo
Debian Releases
Debian Product
Codename
libwebsockets
bookworm
4.1.6-3
fixed
bullseye
not-affected
forky
4.3.5-7
fixed
sid
4.3.5-7
fixed
trixie
4.3.5-1+deb13u2
fixed
trixie (security)
4.3.5-1+deb13u3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libwebsockets
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
Fixed 4.3.3-1.1ubuntu0.1~esm2
released
resolute
Fixed 4.3.5-3ubuntu1.1
released
xenial
not-affected
Common Weakness Enumeration
References
https://github.com/biniamf/pocs/blob/main/libwebsockets-lecp-lecp_parse-cbor_pos_oob_write/poc_lecp_cbor_pos_oob.c
https://github.com/biniamf/pocs/tree/main/libwebsockets-lecp-lecp_parse-cbor_pos_oob_write
https://github.com/warmcat/libwebsockets/
https://github.com/warmcat/libwebsockets/commit/1d44554a1bb262db63ff4e240152a9deecd99054
https://vuldb.com/cve/CVE-2026-78161
https://vuldb.com/submit/883225
https://vuldb.com/vuln/394543
https://vuldb.com/vuln/394543/cti