CVE-2026-104623: A security vulnerability exists in the authorization handling for the local (management) cluster shell feature

Routine

MEDIUM 6.3UPGRADE

CVE-2026-104623 is a medium-severity flaw (CVSS 6.3) affecting rancher. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A security vulnerability exists in the authorization handling for the local (management) cluster shell feature of SUSE Rancher Manager 2.15.0 up to 2.15.3, 2.14.0 up to 2.14.7, 2.13.0 up to 2.13.11, 2.12.0 up to 2.12.15, 2.11.0 up to 2.11.19 and possible older versions. The authorization check that was introduced to protect this feature was not applied to every API route that can reach it, so an alternative request form reached the shell handler

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-290
Published	2026-10-30
Last modified	2026-10-30

Publisher (CNA): suse · Vendor: suse · Source: CVE Program record (NVD analysis pending)

Last updated 2026-10-30 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-30 16:11 UTCPublished CVE record published
2026-10-30 16:11 UTCUpdated Record last modified

suse rancher UPGRADE

Affected: >= 2.15.0 and < 2.15.3 · >= 2.14.0 and < 2.14.7 · >= 2.13.0 and < 2.13.11 · >= 2.12.0 and < 2.12.15 · >= 2.11.0 and < 2.11.19

Fixed in: 2.11.19, 2.12.15, 2.13.11, 2.14.7, 2.15.3

Safe to downgrade to: a release before 2.11.0

1. Check installed version

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

2. UPGRADE to 2.11.19 (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 2.11.0 (Debian / Ubuntu)

apt-cache madison rancher sudo apt install rancher=<VERSION_BEFORE_2.11.0> 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_2.11.0> 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.

Advisories and coverage

Official advisories

Rancher Releases: v2.15.3 2026-10-29

Research and news

VulDB Recent Entries: CVE-2026-104623 | SUSE Rancher up to 2.15.2 Shell improper authorization 2026-10-30

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-2026-104623?

rancher: upgrade to 2.11.19, 2.12.15, 2.13.11, 2.14.7, 2.15.3. Exact commands for each OS are on this page.

Is CVE-2026-104623 being exploited?

CVE-2026-104623 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-2026-104623 affect?

CVE-2026-104623 affects rancher. Severity is medium (CVSS 6.3). A security vulnerability exists in the authorization handling for the local (management) cluster shell feature of SUSE Rancher Manager 2.15.0 up to 2.15.3, 2.14.0 up to 2.14.7, 2.13.0 up to 2.13.11, 2.12.0 up to 2.12.15, 2.11.0 up to 2.11.1

How urgent is CVE-2026-104623?

Priority 22/100. No elevated risk signals yet.

Software pages

Rancher vulnerabilities

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References

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