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CVE-2026-88809— Rancher meta proxy allowlist bypass leading to server-side request forgery

Quick assessment

Affected

SUSE Rancher

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SUSE Rancher Manager 的元代理端点（/meta/proxy）存在一个安全漏洞。该端点的设计初衷是仅将请求转发至配置在白名单中的目标地址。然而，白名单的决策逻辑被置于一个无法阻止请求被转发的位置，导致即使目标地址被拒绝，系统仅会记录日志，仍会将请求交由代理的传输层处理。此漏洞影响 SUSE Rancher 2.15.0 至 2.15.3、2.14.0 至 2.14.7、2.13.0 至 2.13.11、2.12.0 至 2.12.15、2.11.0 至 2.11.19，以及可能更早的已停止维护（E

CVSS 7.6 · High EPSS 0.32% · P25 Updated Nov 03, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

Vendor	Product	Version Range	Status
SUSE	Rancher	`2.15.0< 2.15.3`	affected
		`2.14.0< 2.14.7`	affected
		`2.13.0< 2.13.11`	affected
		`2.12.0< 2.12.15`	affected
		`2.11.0< 2.11.19`	affected

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Vulnerability Information

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Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

服务端请求伪造(SSRF)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
SUSE	Rancher	2.15.0 ~ 2.15.3	-

II. Public POCs for CVE-2026-88809

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-88809

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Other References for CVE-2026-88809 (1)

https://github.com/rancher/rancher/security/advisories/GHSA-f9gf-wh3x-jx3v vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-88809

Same Patch Batch · SUSE · 2026-11-02 · 4 CVEs total

CVE-2026-94290	9.1 CRITICAL	Privilege escalation to cluster-admin on the Rancher local cluster through Fleet's agent m
CVE-2026-88811	9.1 CRITICAL	Rancher credentials disclosed to third-party hosts by the Rancher Manager meta proxy
CVE-2026-88810	7.2 HIGH	Privilege escalation in downstream clusters via GlobalRole inheritedNamespacedRules

IV. Related Vulnerabilities

Same product: Rancher

Same vendor: SUSE

Same weakness: CWE-918