Critical tenant isolation breach in a widely used multi-tenant Kubernetes tool.
CVE-2026-44935
Tenant-to-tenant credential exposure in Rancher Fleet Helm Deployer.
Is CVE-2026-44935 being exploited?
Not confirmed. CVE-2026-44935 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.49% probability of exploitation in the next 30 days.
How severe is CVE-2026-44935?
CVE-2026-44935 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-44935?
Yes. A fix has been recorded for CVE-2026-44935. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-44935 affect?
CVE-2026-44935 affects SUSE Rancher Fleet Helm Deployer (versions <0.15.2, <0.14.6, <0.13.11, <0.12.15). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-44935?
Upgrade to fixed versions; rotate credentials; verify tenant isolation.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Allows one tenant to access another's fleet credentials via unvalidated valuesFrom references in Helm Deployer.
Immediate action required
- affected>= 0.15.0 and < 0.15.2
- affected>= 0.14.0 and < 0.14.6
- affected>= 0.13.0 and < 0.13.11
- affected>= 0.12.0 and < 0.12.15
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.