CVE-2021-36779: Host operations allowed in privileged Longhorn managed pods

Severity: critical (CVSS 9.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-17 · updated 2026-06-17
Weakness: CWE-306

Description

A Missing Authentication for Critical Function vulnerability in SUSE Longhorn allows any workload in the cluster to execute any binary present in the image on the host without authentication. This issue affects: SUSE Longhorn longhorn versions prior to 1.1.3; longhorn versions prior to 1.2.3.

Affected products

SUSE Longhorn: before 1.1.3; from 1.2.0 before 1.2.3 — fixed in 1.1.3, 1.2.3

How to fix

Upgrade to a fixed version: SUSE Longhorn 1.1.3, 1.2.3. Check the vendor advisory for mitigations.

References

https://bugzilla.suse.com/show_bug.cgi?id=1191818
https://github.com/longhorn/longhorn/security/advisories/GHSA-g358-m2wp-mhhx
https://bugzilla.suse.com/show_bug.cgi?id=1191818
https://github.com/longhorn/longhorn/security/advisories/GHSA-g358-m2wp-mhhx

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