What is CVE-2026-88809 in SUSE Rancher Manager?
CVE-2026-88809 is a critical security vulnerability discovered in the SUSE Rancher Manager meta proxy endpoint located at /meta/proxy. This specific endpoint is designed to forward requests only to predefined destinations listed in a configured allowlist.
Similar security flaws have been analyzed previously across software stacks, such as vulnerabilidad crítica CVSS 8.4 affecting internal components, though this specific Rancher issue involves improper evaluation of proxy restrictions.
Who is affected by this meta proxy vulnerability?
This security flaw impacts SUSE Rancher versions 2.15.0 up to 2.15.3, 2.14.0 up to 2.14.7, 2.13.0 up to 2.13.11, 2.12.0 up to 2.12.15, 2.11.0 up to 2.11.19, and potentially older end-of-life versions.
Administrators managing container orchestration platforms using these versions must pay close attention, much like handling vulnerabilidad crítica CVE-2026-115905 in dependency libraries to maintain overall cluster integrity.
Why did the proxy allowlist check fail?
The root cause lies in how the allowlist decision was evaluated within the code flow. Instead of stopping the request, the system logged the rejected destination while still handing the payload directly to the proxy transport.
You can verify additional security details and technical advisories directly through referencia técnica en github.com to understand the mitigation path.
How do I protect my systems?
Mitigating this issue requires immediate attention to vendor updates and proper endpoint restriction configuration. Review similar privilege concerns like referencia técnica en github.com or other advisories for comprehensive defense strategies.
- Identify all running SUSE Rancher instances in your infrastructure.
- Check if your installed version falls within the affected ranges (2.11 through 2.15).
- Consult the official referencia técnica en github.com for the latest patches.
- Apply the vendor-supplied updates immediately.