Detections
Analytics

EulerOS 2.0 SP12 : libwebsockets (EulerOS-SA-2026-4499)

critical Nessus Plugin ID 376697

Synopsis

The remote EulerOS host is missing a security update.

Description

According to the versions of the libwebsockets packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

 libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability.
 This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit this vulnerability.

 The specific flaw exists within the parsing of HTTP/2 HPACK path header. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
 Was ZDI-CAN-31036.(CVE-2026-19773)

Tenable has extracted the preceding description block directly from the EulerOS libwebsockets security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected libwebsockets packages.

See Also

http://www.nessus.org/u?d8584283

Plugin Details

Severity: Critical

ID: 376697

File Name: EulerOS_SA-2026-4499.nasl

Version: 1.1

Type: Local

Published: 11/6/2026

Updated: 11/6/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.51

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-19773

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:huawei:euleros:2.0, p-cpe:/a:huawei:euleros:libwebsockets-help, p-cpe:/a:huawei:euleros:libwebsockets

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp

Excluded KB Items: Host/EulerOS/uvp_version

Exploit Ease: No known exploits are available

Patch Publication Date: 11/5/2026

Vulnerability Publication Date: 9/15/2026

Reference Information

CVE: CVE-2026-19773