UBUNTU-CVE-2026-78161
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.
UBUNTU-CVE-2026-78161
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:UBUNTU-CVE-2026-78161
libwebsockets
Source reference: /affected/0/package/name
- Affected versions
- 4.3.2-4
Source reference:
/affected/0/versions4.3.3-1Source reference:
/affected/0/versions4.3.3-1.1build1Source reference:
/affected/0/versions4.3.3-1.1build2Source reference:
/affected/0/versions4.3.3-1.1build3Source reference:
/affected/0/versions4.3.3-1.1ubuntu0.1~esm1Source reference:
/affected/0/versions - Fixed versions
- 4.3.3-1.1ubuntu0.1~esm2
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
libwebsockets
Source reference: /affected/1/package/name
- Affected versions
- 4.3.5-1
Source reference:
/affected/1/versions4.3.5-3Source reference:
/affected/1/versions4.3.5-3ubuntu1Source reference:
/affected/1/versions - Fixed versions
- 4.3.5-3ubuntu1.1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.3-1.1ubuntu0.1~esm2"
}
]
}
],
"package": {
"name": "libwebsockets",
"purl": "pkg:deb/ubuntu/libwebsockets?arch=source&distro=esm-apps%2Fnoble",
"ecosystem": "Ubuntu:Pro:24.04:LTS"
},
"versions": [
"4.3.2-4",
"4.3.3-1",
"4.3.3-1.1build1",
"4.3.3-1.1build2",
"4.3.3-1.1build3",
"4.3.3-1.1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78161.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwebsockets-evlib-ev",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets-evlib-glib",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets-evlib-uv",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets-test-server",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets-test-server-common",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets19t64",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.5-3ubuntu1.1"
}
]
}
],
"package": {
"name": "libwebsockets",
"purl": "pkg:deb/ubuntu/libwebsockets?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"4.3.5-1",
"4.3.5-3",
"4.3.5-3ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78161.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwebsockets-evlib-ev",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets-evlib-glib",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets-evlib-uv",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets-test-server",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets-test-server-common",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets19t64",
"binary_version": "4.3.5-3ubuntu1.1"
}
],
"availability": "No subscription required"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #22399 · Revision 1
- Added to Heist Feed
- Publisher date