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RHEL 8 : pcs (RHSA-2026:8093)

high Nessus Plugin ID 306403

Synopsis

The remote Red Hat host is missing a security update for pcs.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:8093 advisory.

 The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

 Security Fix(es):

 * tornado-python: Tornado: Denial of Service via large multipart bodies (CVE-2026-31958)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 RHEL pcs package based on the guidance in RHSA-2026:8093.

See Also

https://access.redhat.com/security/updates/classification/#moderate

https://bugzilla.redhat.com/show_bug.cgi?id=2446765

http://www.nessus.org/u?1bdfd89f

https://access.redhat.com/errata/RHSA-2026:8093

Plugin Details

Severity: High

ID: 306403

File Name: redhat-RHSA-2026-8093.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/14/2026

Updated: 4/14/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-31958

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:pcs, p-cpe:/a:redhat:enterprise_linux:pcs-snmp, cpe:/o:redhat:rhel_eus:8.10, cpe:/o:redhat:enterprise_linux:8

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/14/2026

Vulnerability Publication Date: 3/11/2026

Reference Information

CVE: CVE-2026-31958

CWE: 770

RHSA: 2026:8093