Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer

Date Jul 1, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product Go ยท github.com/rancher/fleet
CVE CVE-2026-44935
High-risk advisory CVE-2026-44935

Summary

Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer

Why it matters

GitHub has published a reviewed security advisory for github.com/rancher/fleet. Prioritize it with other application dependency updates.

Operator check

Check whether github.com/rancher/fleet is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.