CVE-2026-44938 Fleet has PSS Bypass through addLabelsFromOptions in Fleet Agent
An attacker with git push access can bypass Pod Security Standards by overwriting namespace labels, allowing deployment of restricted workloads.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44938?
CVE-2026-44938 is a high-severity vulnerability in SUSE Rancher, published on 7 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been identified in Fleet's agent-side deployer, which did not filter security-sensitive keys from namespaceLabels in fleet.yaml (or BundleDeployment.spec.options.namespaceLabels) when applying them to the target namespace.
An attacker with git push access to a Fleet-monitored repository could overwrite Pod Security Standards (PSS) enforcement labels on a target namespace. This allows the attacker to weaken admission controls and deploy workloads that PSS policies would otherwise block.
Weakness: CWE-522
Which versions are affected by CVE-2026-44938?
9 open source packages ship an affected version, including github.com/rancher/fleet. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/rancher/fleet Go | From 0.12.0 | 0.12.15, 0.13.11, 0.14.6, 0.15.2 |
github.com/rancher/fleet Go | From 0.12.0 | 0.12.15 |
github.com/rancher/fleet Go | From 0.12.0 | 0.12.15 |
github.com/rancher/fleet Go | From 0.13.0 | 0.13.11 |
github.com/rancher/fleet Go | From 0.13.0 | 0.13.11 |
github.com/rancher/fleet Go | From 0.14.0 | 0.14.6 |
3 more packages
github.com/rancher/fleet Go | From 0.14.0 | 0.14.6 |
github.com/rancher/fleet Go | From 0.15.0 | 0.15.2 |
github.com/rancher/fleet Go | From 0.15.0 | 0.15.2 |
Products include Suse Rancher Fleet.
How do I fix CVE-2026-44938?
Upgrade github.com/rancher/fleet to a fixed version for your release line: 0.12.15, 0.13.11, 0.14.6 or 0.15.2.
Is CVE-2026-44938 being exploited?
There is no known exploitation of CVE-2026-44938 in the wild and no public exploit code.
Other vulnerabilities in SUSE Rancher
- CVE-2026-44935 Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer
- CVE-2026-41050 Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering
- CVE-2026-88808 Privilege escalation in Rancher
- CVE-2026-44937 SUSE Rancher Fleet had an Unauthenticated Webhook: Regex Injection via Unsanitized Repository URL Components
- CVE-2026-93538 Missing authorization in Rancher
Sources
Also known as GHSA-864g-863m-vcvq, GO-2026-5871.