CVE-2026-41050 Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering
Attackers with git push access can bypass Helm impersonation to read secrets from any namespace on downstream clusters via cluster-admin privileges.
- 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-2026-41050?
CVE-2026-41050 is a critical missing authorization vulnerability in SUSE Rancher, published on 13 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Fleet's Helm deployer did not fully apply ServiceAccount impersonation in two code paths, allowing a tenant with git push access to a Fleet-monitored repository to read secrets from any namespace on every downstream cluster targeted by their `GitRepo`.
Weakness: CWE-863
Which versions are affected by CVE-2026-41050?
11 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 0.11.0 | 0.11.13, 0.12.14, 0.13.10, 0.14.5, 0.15.1 |
github.com/rancher/fleet Go | From 0.11.0 | 0.11.13 |
github.com/rancher/fleet Go | From 0.11.0 | 0.11.13 |
github.com/rancher/fleet Go | From 0.12.0 | 0.12.14 |
github.com/rancher/fleet Go | From 0.12.0 | 0.12.14 |
github.com/rancher/fleet Go | From 0.13.0 | 0.13.10 |
5 more packages
github.com/rancher/fleet Go | From 0.13.0 | 0.13.10 |
github.com/rancher/fleet Go | From 0.14.0 | 0.14.5 |
github.com/rancher/fleet Go | From 0.14.0 | 0.14.5 |
github.com/rancher/fleet Go | From 0.15.0 | 0.15.1 |
github.com/rancher/fleet Go | From 0.15.0 | 0.15.1 |
Products include Suse Rancher Fleet.
How do I fix CVE-2026-41050?
Upgrade github.com/rancher/fleet to a fixed version for your release line: 0.11.13, 0.12.14, 0.13.10 or 0.14.5.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-41050 being exploited?
There is no known exploitation of CVE-2026-41050 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-2026-88808 Privilege escalation in Rancher
- CVE-2026-44938 Fleet has PSS Bypass through addLabelsFromOptions in Fleet Agent
- 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-765j-qfrp-hm3j, GO-2026-5207.