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Fencer Vulns
critical 9.6

CVE-2026-44939 json

Command injection through unsanitized YAML parameter in Rancher

published 2026-06-19 4 mo ago modified 2026-11-03 5 d ago also GHSA-mhc6-2gfq-xx62 , GO-2026-5875 , EUVD-2026-38009

cvss
9.6
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/rancher/rancher 0.0.0-20260617231817-2aa77eb283e7, 2.10.12, 2.11.14, 2.12.10, 2.13.6, 2.14.2
  • SUSE Rancher 2.10.12, 2.11.14, 2.12.10, 2.13.6, 2.14.2
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

1.28% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 9.4 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CNA 4.0 9.4 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
GitHub 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/rancher/rancher
>=2.14.0, <2.14.2
>=2.13.0, <2.13.6
>=2.12.0, <2.12.10
>=2.11.0, <2.11.14
>=2.10.0, <2.10.12
<0.0.0-20260617231817-2aa77eb283e7
2.14.2
2.13.6
2.12.10
2.11.14
2.10.12
0.0.0-20260617231817-2aa77eb283e7

Affected products

  • SUSE Rancher

Classification

Weakness
  • CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.