PatchDayAlert
Daily Digest · 2 min read · 5 CVEs · Issue 40 By PatchDayAlert

Firefox sandbox escape, a Dell RCE, and a Pacemaker crasher walk into your queue

CVE-2026-12289 lets attackers break out of Firefox/Thunderbird's WebRender sandbox (CVSS 8.8). Dell OpenManage and Pacemaker CIB also carry 8.6+ bugs, plus a command injection in Galaxy NG and a TLS bypass between Harvester and Rancher.

Patch now
0
Within 24h
2
This week
3
Exploited
0
Mozilla FirefoxMozilla ThunderbirdWindowsLinuxMacOSDell OpenManageWindows Admin CenterPacemakerGalaxy NGAnsible Automation HubSUSE HarvesterRancher Manager

Nothing's on fire, but don't sleep on this one. A Firefox/Thunderbird sandbox escape (CVE-2026-12289, CVSS 8.8) lets attackers escalate privileges through the WebRender graphics component if a user hits a malicious page or opens a crafted email. No exploitation in the wild yet, but the attack surface is huge. Four more high-severity bugs round out the day, including a Dell OpenManage RCE and a Pacemaker cluster crasher.


Today's CVEs

Sorted by urgency

02

CVE-2024-24909

NVD
8.8
CVSS
Patch within 24h HIGH
Dell OpenManageWindows Admin CenterWindows

A remote authenticated user can execute arbitrary code through Dell's OpenManage Integration plugin for Windows Admin Center. Successful exploitation lets the attacker escalate privileges, potentially taking full control of the gateway host. CVSS 8.8, not exploited in the wild.

Included because
CVSS 8.8; remote code execution; authenticated but targets a high-privilege management console
Affected estate
Any Windows Admin Center instance with the Dell OpenManage Integration gateway plugin installed.
How to check
Open Windows Admin Center, go to Settings > Extensions, and check the installed version of the Dell OpenManage Integration plugin. Cross-reference with Dell's advisory for the fixed version number.
Action
Download and install the patched plugin version from Dell's support portal.
Urgency
Patch within 24 hours
Why it matters
An authenticated attacker can run arbitrary code on a management gateway, which typically has broad access to your server fleet.
Source
Dell Security Advisory

Evidence trail

03

CVE-2026-10649

NVD
8.6
CVSS
Patch within 24h HIGH
PacemakerLinux

An unauthenticated remote attacker can crash the Pacemaker CIB remote listener by sending a specially crafted compressed message. The bug is an integer overflow in the decompression path that triggers memory corruption before any authentication check. This is a denial-of-service issue that can take down your cluster management layer. CVSS 8.6.

Included because
unauthenticated; pre-auth exploitation; network-reachable; affects high-availability infrastructure
Affected estate
Any Linux host running Pacemaker with the CIB remote listener enabled and reachable over the network.
How to check
Run `pacemaker-remoted --version` or `rpm -q pacemaker` / `dpkg -l pacemaker` to get the installed version. Check if the CIB remote listener port (default 3121) is open with `ss -tlnp | grep 3121`.
Action
Patch the pacemaker package and restart cluster services. If a patch is not yet available for your distro, restrict network access to port 3121 to trusted cluster nodes only.
Urgency
Patch within 24 hours
Why it matters
Crashing the CIB listener takes down cluster management, which can cascade into failover storms or split-brain conditions across your HA environment.
Source
Red Hat / Pacemaker upstream advisory

Evidence trail

04

CVE-2026-12398

NVD
7.5
CVSS
Patch this week HIGH
Galaxy NGAnsible Automation HubLinux

An authenticated user who controls an external git repository can inject shell commands through crafted branch or tag names when importing legacy roles via the Galaxy NG v1 API. This gives the attacker remote code execution on the Pulp worker. The catch: the vulnerable endpoint is only reachable when GALAXY_ENABLE_LEGACY_ROLES is set to True, which is not the default. CVSS 7.5.

Included because
authenticated; RCE; non-default config required but commonly enabled in legacy environments
Affected estate
Galaxy NG or Ansible Automation Hub instances with GALAXY_ENABLE_LEGACY_ROLES=True in their configuration.
How to check
Check your Galaxy NG settings (typically in /etc/pulp/settings.py or the environment variables) for GALAXY_ENABLE_LEGACY_ROLES. If it's not set or is False, you're not exposed through this path.
Action
Update galaxy_ng to the fixed release. As an immediate mitigation, set GALAXY_ENABLE_LEGACY_ROLES=False and restart the service.
Urgency
Patch this week
Why it matters
An authenticated attacker can get full code execution on the Pulp worker, which processes content and has access to stored automation artifacts.
Source
Red Hat / Galaxy NG upstream advisory

Evidence trail

05

CVE-2025-71261

NVD
8.6
CVSS
Patch this week HIGH
SUSE HarvesterRancher ManagerLinux

An attacker with network access between SUSE Harvester's virtualization layer and Rancher Manager can interfere with the TLS handshake and bypass TLS protections entirely. This means management traffic between these components could be intercepted or tampered with. CVSS 8.6, not exploited in the wild. Requires the attacker to be positioned on the internal network path between the two services.

Included because
CVSS 8.6; TLS bypass on management plane; requires network positioning but affects infrastructure control path
Affected estate
SUSE Harvester installations prior to version 1.8.0 that are integrated with Rancher Manager.
How to check
Check the Harvester version in the dashboard UI or via `kubectl get settings.harvesterhci.io server-version -o jsonpath='{.value}'`. Any version below 1.8.0 is affected.
Action
Upgrade Harvester to 1.8.0 or later. If you can't upgrade immediately, restrict network access between Harvester nodes and Rancher Manager to a trusted, segmented VLAN.
Urgency
Patch this week
Why it matters
Bypassing TLS between Harvester and Rancher lets a network-positioned attacker intercept or modify management commands controlling your virtual infrastructure.
Source
SUSE Security Advisory

Evidence trail


One email, every Wednesday morning.

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