Rancher code injection via fluentd config commands

published 2019-06-06 7y ago modified 2026-06-17 4mo ago also GHSA-53pj-67m4-9w98 , GO-2024-2762 , EUVD-2022-2485

cvss: 8.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

In Rancher 2 through 2.2.3, Project owners can inject additional fluentd configuration to read files or execute arbitrary commands inside the fluentd container.

Patch / fix

fixed in 1

go github.com/rancher/rancher 2.2.4, 2.2.4+incompatible

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Exploit prediction

1.98% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
go	github.com/rancher/rancher	>=2.0.0, <2.2.4 >=2.0.0+incompatible, <2.2.4+incompatible	2.2.4 2.2.4+incompatible

Classification

Weakness

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

forums.rancher.com /c/announcements
release-notes, vendor-advisory
forums.rancher.com /t/rancher-release-v2-2-4-addresses-rancher-cve-2019-12274-and-cve-2019-12303/14466
web, release-notes, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2019-12303
advisory
github.com /rancher/rancher
package
github.com /advisories/GHSA-53pj-67m4-9w98
advisory

Sources

Fencer Intel 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.