Description
A vulnerability has been identified within Rancher Manager in which it
did not enforce request body size limits on certain public
(unauthenticated) and authenticated API endpoints. This allows a
malicious user to exploit this by sending excessively large payloads,
which are fully loaded into memory during processing, leading to Denial of Service (DoS).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| SUSE | rancher | 2.12.0 – < 2.12.1, 2.11.0 – < 2.11.5, 2.10.0 – < 2.10.9, 2.9.0 – < 2.9.11, < 0.0.0-20250813072957-aee95d4e2a41 | 2.12.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | govulncheck-vulndb | 0.0.20250918T182144-150000.1.107.1 | SUSE-SU-2025:03289-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20250908T141310-1.1 | openSUSE-SU-2025:15538-1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20250918T182144-150000.1.107.1 | SUSE-SU-2025:03289-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/rancher/rancher | >= 2.12.0, < 2.12.1 | 2.12.1 | GHSA-4h45-jpvh-6p5j |
| Go | github.com/rancher/rancher | >= 2.11.0, < 2.11.5 | 2.11.5 | GHSA-4h45-jpvh-6p5j |
| Go | github.com/rancher/rancher | >= 2.10.0, < 2.10.9 | 2.10.9 | GHSA-4h45-jpvh-6p5j |
| Go | github.com/rancher/rancher | >= 2.9.0, < 2.9.11 | 2.9.11 | GHSA-4h45-jpvh-6p5j |
| Go | github.com/rancher/rancher | < 0.0.0-20250813072957-aee95d4e2a41 | 0.0.0-20250813072957-aee95d4e2a41 | GHSA-4h45-jpvh-6p5j |
Advisories 4
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- openSUSE-SU-2025:15538-1 govulncheck-vulndb-0.0.20250908T141310-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03289-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-1922 Rancher: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Sep 2, 2025