CVE-2026-88809

Rancher meta proxy allowlist bypass leading to server-side request forgery

Published Nov 2, 2026 CVSS 3.1 · 7.6 High EPSS < 1% KEV · Not listed
Description
A security vulnerability exists in the SUSE Rancher Manager meta proxy endpoint (/meta/proxy). This endpoint is intended to forward requests only to  destinations that appear on a configured allowlist. The allowlist decision was evaluated in a  place where it could not stop a request from being forwarded, so a rejected destination was logged but the request was still handed to the proxy's transport. 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, 2.12.0 up to 2.12.15, 2.11.0 up to 2.11.19 and potentially older EOL versions.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A security vulnerability exists in the SUSE Rancher Manager meta proxy endpoint (/meta/proxy). This endpoint is intended to forward requests only to  destinations that appear on a configured allowlist. The allowlist decision was evaluated in a  place where it could not stop a request from being forwarded, so a rejected destination was logged but the request was still handed to the proxy's transport. 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, 2.12.0 up to 2.12.15, 2.11.0 up to 2.11.19 and potentially older EOL versions.
Title Rancher meta proxy allowlist bypass leading to server-side request forgery
First Time appeared Suse
Suse rancher
Weaknesses CWE-918
CPEs cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*
Vendors & Products Suse
Suse rancher
References
Metrics cvssV3_1

{'score': 7.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
suse
Published
Updated
Nov 2, 2026, 6:55 PM
Reserved
Sep 10, 2026, 8:35 AM
Status
Awaiting Analysis
Published
Nov 2, 2026, 4:17 PM
Modified
Nov 2, 2026, 7:18 PM