CVE-2026-41050: Fleet's Helm deployer did not fully apply ServiceAccount impersonation in two code paths, allowing a tenant wi

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CRITICAL 9.9UPGRADE

CVE-2026-41050 is a critical-severity flaw (CVSS 9.9) affecting rancher fleet. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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`.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-05-13
Last modified	2026-10-26

Publisher (CNA): SUSE · Vendor: suse

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-13 08:16 UTCPublished CVE record published
2026-10-26 14:10 UTCUpdated Record last modified

suse rancher fleet UPGRADE

Affected: >= 0.11.0 and < 0.11.13 · >= 0.12.0 and < 0.12.14 · >= 0.13.0 and < 0.13.10 · >= 0.14.0 and < 0.14.5 · >= 0.15.0 and < 0.15.1

Fixed in: 0.11.13, 0.12.14, 0.13.10, 0.14.5, 0.15.1

Safe to downgrade to: a release before 0.11.0

1. Check installed version

apt-cache policy rancher-fleet || rpm -q rancher-fleet || rancher-fleet --version

2. UPGRADE to 0.11.13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rancher-fleet

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rancher-fleet

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.11.0 (Debian / Ubuntu)

apt-cache madison rancher-fleet sudo apt install rancher-fleet=<VERSION_BEFORE_0.11.0> sudo apt-mark hold rancher-fleet

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list rancher-fleet sudo dnf downgrade rancher-fleet-<VERSION_BEFORE_0.11.0> sudo dnf versionlock add rancher-fleet

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41050?

rancher fleet: upgrade to 0.11.13, 0.12.14, 0.13.10, 0.14.5, 0.15.1. Exact commands for each OS are on this page.

Is CVE-2026-41050 being exploited?

CVE-2026-41050 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41050 affect?

CVE-2026-41050 affects rancher fleet. Severity is critical (CVSS 9.9). 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 thei

How urgent is CVE-2026-41050?

Priority 43/100. Critical severity

Software pages

Git vulnerabilities · Helm vulnerabilities · Rancher vulnerabilities

Related CVEs

CVE-2026-44935 CRITICAL 9.9 UPGRADE Missing validation of "valuesFrom" references in Helm Deployer of SUSE Rancher Fleet 0.15 before 0.15.2, 0.14
CVE-2026-44948 MEDIUM 4.9 UPGRADE A path traversal vulnerability was found in Fleet's ImageScan subsystem in Rancher Fleet 0.12.0 up to 0.12.16,
CVE-2026-44938 HIGH 8.8 UPGRADE A vulnerability has been identified in Fleet's agent-side deployer, which did not filter security-sensitive ke
CVE-2026-44937 HIGH 8.2 UPGRADE Potential forgery of webhook requests when using a unauthenticated webhook in SUSE Rancher Fleet 0.15 before 0
CVE-2026-44936 MEDIUM 5.0 UPGRADE Missing filtering when the helmRepoURLRegex field isn't set on a GitRepo resource in SUSE Rancher Fleet's bund

References

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