CVE-2026-44939

Rancher vulnerable to command injection through unsanitized YAML parameter

Published 19 Jun 2026Modified 26 Oct 2026CWE 95

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

GHSA9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Trivy's own label is CRITICAL. Rated critical by GHSA.

Description

A command injection vulnerability in the Rancher Manager cluster before 2.14.2 import endpoint /v3/import/{token}_{clusterId}.yaml through unsanitized YAML parameters could allow remote attackers to break out of an image, and execute e.g. malicious containers.

Affected packages and fixed versions

Source	Package	Fixed in
go::GitHub Security Advisory Go	github.com/rancher/rancher	2.14.2, 2.13.6, 2.12.10, 2.11.14, 2.10.12, 0.0.0-20260617231817-2aa77eb283e7
chainguard	harvester, harvester-fips	1.8.1-r32 and 1 more

Show all 3 entries from 2 sources

Source	Package	Fixed in
go::GitHub Security Advisory Go	github.com/rancher/rancher	2.14.2, 2.13.6, 2.12.10, 2.11.14, 2.10.12, 0.0.0-20260617231817-2aa77eb283e7
chainguard	harvester	1.8.1-r32
chainguard	harvester-fips	1.8.1-r29

References

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FindsEvery admitted image is rescanned every 24 hours by default (scan.rescanInterval). When Trivy rates this vulnerability critical for the image's package source, it appears in the image's findings by name. Findings without a fix are left out unless includeUnfixed is on.
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RefusesWith a policy that blocks critical findings, a pod with this image is refused at admission, a rollback to it included. Pods already running are not evicted.
RecordsEach decision is recorded with the policy that ran and its hash, then sealed under a signed checkpoint.

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Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.