CVE-2026-41053: Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provid

This month

HIGH 8.8UPGRADE

CVE-2026-41053 is a high-severity flaw (CVSS 8.8) affecting rancher. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-303
Published	2026-06-30
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

2026-06-30 12:16 UTCPublished CVE record published
2026-10-25 21:10 UTCUpdated Record last modified

suse rancher UPGRADE

Affected: >= 2.13.0 and < 2.13.6 · >= 2.14.0 and < 2.14.2

Fixed in: 2.13.6, 2.14.2

Safe to downgrade to: a release before 2.13.0

1. Check installed version

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

2. UPGRADE to 2.13.6 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rancher

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 2.13.0 (Debian / Ubuntu)

apt-cache madison rancher sudo apt install rancher=<VERSION_BEFORE_2.13.0> sudo apt-mark hold rancher

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

dnf --showduplicates list rancher sudo dnf downgrade rancher-<VERSION_BEFORE_2.13.0> sudo dnf versionlock add rancher

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-2026-41053?

rancher: upgrade to 2.13.6, 2.14.2. Exact commands for each OS are on this page.

Is CVE-2026-41053 being exploited?

CVE-2026-41053 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-2026-41053 affect?

CVE-2026-41053 affects rancher. Severity is high (CVSS 8.8). Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2.

How urgent is CVE-2026-41053?

Priority 42/100. High severity

Software pages

GitHub vulnerabilities · Rancher vulnerabilities

Related CVEs

CVE-2026-41052 HIGH 8.8 UPGRADE Improper privilege handling could be used by users with Project Owner role to escalate privileges, in Rancher
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CVE-2023-22647 CRITICAL 9.9 UPGRADE An Improper Privilege Management vulnerability in SUSE Rancher allowed standard users to leverage their existi
CVE-2022-43760 HIGH 8.4 UPGRADE An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in SUSE

References

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