Description
In Calico, the install-cni init container logs the rendered CNI configuration to standard output. When the configuration template uses the __SERVICEACCOUNT_TOKEN__ placeholder (Canal/Flannel-Calico deployments), the installer substitutes the live Kubernetes ServiceAccount bearer token before logging, exposing the token to any authenticated user with pods/log permission in the namespace with calico-node. The token holds patch privileges on pods/status, enabling annotation-based attacks against cluster workloads. The default kubeconfig-based authentication path is not affected. This is a direct regression of TTA-2018-001.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Tigera | Calico | < 3.31.6 | 3.32.0 |
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.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/projectcalico/calico | >= 2.0.0, < 3.31.6 | 3.31.6 | GHSA-9p7w-w5q6-mxj3 |
| Go | github.com/projectcalico/calico | < 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f | 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f | GHSA-9p7w-w5q6-mxj3 |
| Go | github.com/projectcalico/calico/v3 | all versions | — | GO-2026-5888 |
Advisories 1
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026