Detections
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RHEL 8 / 9 : Satellite 6.16.8 Async Update (Important) (RHSA-2026:14874)
critical Nessus Plugin ID 313105
Synopsis
The remote Red Hat host is missing one or more security updates.Description
The remote Redhat Enterprise Linux 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:14874 advisory.Red Hat Satellite is a system management solution that allows organizations to configure and maintain their systems without the necessity to provide public Internet access to their servers or other client systems. It performs provisioning and configuration management of predefined standard operating environments.
Security Fix(es):
* python-pillow: Pillow: Out-of-bounds Write via Specially Crafted PSD Image (CVE-2026-25990)
* candlepin: mchange-commons-java: Arbitrary code execution via JNDI dereferencing of crafted objects (CVE-2026-27727)
* python-markdown: denial of service via malformed HTML-like sequences (CVE-2025-69534)
* python-pyOpenSSL: DTLS cookie callback buffer overflow (CVE-2026-27459)
* rubygem-activesupport: Active Support: Denial of Service via large scientific notation strings (CVE-2026-33176)
Bug Fix(es):
* Satellite manifest consumer profile cert and key found in satellite client rhsm cache (SAT-43030)
* All communication should happen only over https during global registration execution (SAT-44031)
* Impossible to generate registration command via REST API in isolated networks managed by external capsules (SAT-44032)
* Executing the 'katello::clean_backend_objects' rake task takes a long time to complete (SAT-44033)
* Puppet fact parser can't create OS entry blocking Satellite leapp upgrades (SAT-44035)
* No repositories available through subscriptions on a cloud-instance host after registering it to Red Hat Satellite using global registration method (SAT-44036)
* Proxy password shown in clear text in the Overview page of Virt-who Configuration (SAT-43834)
* Non-admin users on Satellite with viewer role, unable to see the hostgroup. (SAT-44034)
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2439170
https://bugzilla.redhat.com/show_bug.cgi?id=2442671
https://bugzilla.redhat.com/show_bug.cgi?id=2444839
https://bugzilla.redhat.com/show_bug.cgi?id=2448503
https://bugzilla.redhat.com/show_bug.cgi?id=2450551
https://issues.redhat.com/browse/SAT-43834
https://issues.redhat.com/browse/SAT-44030
https://issues.redhat.com/browse/SAT-44031
https://issues.redhat.com/browse/SAT-44032
https://issues.redhat.com/browse/SAT-44033
https://issues.redhat.com/browse/SAT-44034
https://issues.redhat.com/browse/SAT-44035
https://issues.redhat.com/browse/SAT-44036
Plugin Details
Severity: Critical
ID: 313105
File Name: redhat-RHSA-2026-14874.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Red Hat Local Security Checks
Published: 5/7/2026
Updated: 5/7/2026
Supported Sensors: Continuous Assessment, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-27727
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.8
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:P/RL:O/RC:C
CVSS v4
Risk Factor: Critical
Base Score: 9.2
Threat Score: 8.2
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2026-27459
Vulnerability Information
CPE: p-cpe:/a:redhat:enterprise_linux:python3.11-markdown, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:rubygem-activesupport, p-cpe:/a:redhat:enterprise_linux:python-markdown, p-cpe:/a:redhat:enterprise_linux:python-pyopenssl, p-cpe:/a:redhat:enterprise_linux:candlepin, p-cpe:/a:redhat:enterprise_linux:python3.11-pyopenssl, p-cpe:/a:redhat:enterprise_linux:python3.11-pillow, p-cpe:/a:redhat:enterprise_linux:candlepin-selinux, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:python-pillow
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 5/7/2026
Vulnerability Publication Date: 2/11/2026
Reference Information
CVE: CVE-2025-69534, CVE-2026-25990, CVE-2026-27459, CVE-2026-27727, CVE-2026-33176