CVE-2026-44936: Missing filtering when the helmRepoURLRegex field isn't set on a GitRepo resource in SUSE Rancher Fleet's bund

Routine

MEDIUM 5.0UPGRADE

CVE-2026-44936 is a medium-severity flaw (CVSS 5.0) affecting rancher fleet. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Missing filtering when the helmRepoURLRegex field isn't set on a GitRepo resource in SUSE Rancher Fleet's bundle reader in 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 forwards Helm authentication credentials (BasicAuth) to any URL specified in the helm.repo field of a fleet.yaml file, allowing attackers able to push to fleet monitored git repos to leak helm access credentials.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-07-06
Last modified	2026-10-25

Publisher (CNA): SUSE · Vendor: suse

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-06 11:16 UTCPublished CVE record published
2026-10-25 15:10 UTCUpdated Record last modified

suse rancher fleet UPGRADE

Affected: >= 0.12.0 and < 0.12.15 · >= 0.13.0 and < 0.13.11 · >= 0.14.0 and < 0.14.6 · >= 0.15.0 and < 0.15.2

Fixed in: 0.12.15, 0.13.11, 0.14.6, 0.15.2

Safe to downgrade to: a release before 0.12.0

1. Check installed version

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

2. UPGRADE to 0.12.15 (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 0.12.0 (Debian / Ubuntu)

apt-cache madison rancher-fleet sudo apt install rancher-fleet=<VERSION_BEFORE_0.12.0> 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_0.12.0> 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-2026-44936?

rancher fleet: upgrade to 0.12.15, 0.13.11, 0.14.6, 0.15.2. Exact commands for each OS are on this page.

Is CVE-2026-44936 being exploited?

CVE-2026-44936 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-2026-44936 affect?

CVE-2026-44936 affects rancher fleet. Severity is medium (CVSS 5.0). Missing filtering when the helmRepoURLRegex field isn't set on a GitRepo resource in SUSE Rancher Fleet's bundle reader in 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 forwards Helm authentication cred

How urgent is CVE-2026-44936?

Priority 30/100. Public exploit reference

Software pages

Git vulnerabilities · Helm vulnerabilities · Rancher vulnerabilities

Related CVEs

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

References

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