CVE-2026-44935 Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer
Attackers can access other tenants' fleet credentials due to missing validation of Helm Deployer references in Rancher Fleet.
- 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-2026-44935?
CVE-2026-44935 is a critical missing authorization vulnerability in SUSE Rancher, published on 2 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Missing validation of "valuesFrom" references in Helm Deployer of SUSE Rancher Fleet 0.15 before 0.15.2, 0.14 before 0.14.6, 0.13 before 0.13.11 and 0.12 before 0.12.15 could be used by owners of one tenant to access fleet credentials of other tenants.
Weakness: CWE-1287
Which versions are affected by CVE-2026-44935?
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-2026-44935?
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.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-44935 being exploited?
There is no known exploitation of CVE-2026-44935 in the wild and no public exploit code.
Other vulnerabilities in SUSE Rancher
- CVE-2026-41050 Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering
- 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-xr65-5cpm-g36x, GO-2026-5877.