CVE-2026-41184
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.
- CVSS 4.0
- 6.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L - CVSS 3.1
- 6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-25)
- CWE
- CWE-532
- Published
- Modified
- Record from
- the NVD, synced
Affected
- tigera:calico
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9p7w-w5q6-mxj3 | 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 |
| GO-2026-5888 | Go | github.com/projectcalico/calico | <1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f | 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f |
| GO-2026-5888 | Go | github.com/projectcalico/calico/v3 | all versions | no fix published |