CVE-2026-41184
MEDIUM EPSS 39.3%
Published May 28, 20261mo ago · Modified Jun 17, 20262w ago
6.0 CVSS 4.0
Published May 28, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
39.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-532
Affected Products 4
References 4
- github.com https://github.com/projectcalico/calico/pull/12502
- github.com https://github.com/projectcalico/calico/pull/12526
- github.com https://github.com/projectcalico/calico/pull/12527
- tigera.io https://www.tigera.io/security-bulletins/tta-2026-001/
Remediation
- github.com https://github.com/projectcalico/calico/pull/12502
- github.com https://github.com/projectcalico/calico/pull/12526
- github.com https://github.com/projectcalico/calico/pull/12527