CVE-2026-41184
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/projectcalico/calicoGo | >= 2.0.0, < 3.31.6 | 3.31.6 |
github.com/projectcalico/calicoGo | < 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f | 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f |
Affected products
6(expand)+ 1 more
- (no CPE)
- (no CPE)
- osv-coordsRange: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
10- github.com/projectcalico/calico/pull/12502nvdIssue TrackingPatchWEB
- github.com/projectcalico/calico/pull/12526nvdIssue TrackingPatchWEB
- github.com/projectcalico/calico/pull/12527nvdIssue TrackingPatchWEB
- github.com/advisories/GHSA-9p7w-w5q6-mxj3ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-41184ghsaADVISORY
- www.tigera.io/security-bulletins/tta-2026-001/nvdMitigationVendor Advisory
- github.com/projectcalico/calico/commit/0ca653db0ae7400ea9fb066daa7f45c902482271ghsaWEB
- github.com/projectcalico/calico/commit/cd73bc2cea0f4989772f2deb93909e7cfac927e0ghsaWEB
- github.com/projectcalico/calico/commit/da9ea3a13927a35e4022b787d17a005b2157d812ghsaWEB
- www.tigera.io/security-bulletins/tta-2026-001ghsaWEB
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