GHSA-864g-863m-vcvq: github.com/rancher/fleet (CVE-2026-44938)

Fleet has PSS Bypass through addLabelsFromOptions in Fleet Agent

CVSS 8.8 HighEPSS 0.0044 · 38th percentile

Published by the GitHub Advisory Database at 1 Jul 2026, 20:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
github.com/rancher/fleet	Go	>=0.15.0, <0.15.2 \|\| >=0.14.0, <0.14.6 \|\| >=0.13.0, <0.13.11 \|\| >=0.12.0, <0.12.15	0.15.2, 0.14.6, 0.13.11, 0.12.15

Identifiers

GHSA-864g-863m-vcvq · CVE-2026-44938 · GO-2026-5871

Weakness (CWE)

CWE-522

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Fleet (github.com/rancher/fleet) versions from 0.12.0 to before 0.12.15, 0.13.0 to before 0.13.11, 0.14.0 to before 0.14.6, and 0.15.0 to before 0.15.2 do not filter Pod Security Standards labels from namespaceLabels in fleet.yaml or BundleDeployment options. An attacker with git push access to a Fleet-monitored repository can overwrite PSS enforcement labels on a target namespace, weakening admission controls. Upgrade to 0.12.15, 0.13.11, 0.14.6, 0.15.2 or later.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.8	High	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (suse)

CISA KEV Not listed.
EPSS 0.0044, the 38th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 15:06 UTC First seen by agentprime
31 Oct 2026, 15:06 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.