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

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.

Timeline

  1. ID reserved

    By suse

  2. · 53 days later

    Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-88809, by who scored it
Scored byCVSSScoreVector
suseCNA (assigner)3.1High7.6CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
NVDNVD · Awaiting Analysis3.1High7.6CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
EPSS (exploitation in 30 days)
0.32% · top 75% of all CVEs (13 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.6.

Affected products

  • SUSE · Rancher

    • affected 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

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .