6.0 MEDIUM
- CVSS version (CVSS): 4.0
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Attack Requirement (AT): Present (P)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Vulnerable System Impact Confidentiality (VC): High (H)
- Vulnerable System Impact Integrity (VI): None (N)
- Vulnerable System Impact Availability (VA): None (N)
- Subsequent System Impact Confidentiality (SC): Low (L)
- Subsequent System Impact Integrity (SI): Low (L)
- Subsequent System Impact Availability (SA): Low (L)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Attack Requirement (MAT): Present (P)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Vulnerable System Impact Confidentiality (MVC): High (H)
- Modified Vulnerable System Impact Integrity (MVI): None (N)
- Modified Vulnerable System Impact Availability (MVA): None (N)
- Modified Subsequent System Impact Confidentiality (MSC): Low (L)
- Modified Subsequent System Impact Integrity (MSI): Low (L)
- Modified Subsequent System Impact Availability (MSA): Low (L)
- Safety (S): Not Defined (X)
- Automatable (AU): Not Defined (X)
- Recovery (R): Not Defined (X)
- Value Density (V): Not Defined (X)
- Vulnerability Response Effort (RE): Not Defined (X)
- Provider Urgency (U): Not Defined (X)
- Confidentiality Req. (CR): Not Defined (X)
- Integrity Req. (IR): Not Defined (X)
- Availability Req. (AR): Not Defined (X)
- Exploit Maturity (E): Not Defined (X)
Activity log
- Created suggestion
ServiceAccount token disclosure via install-cni container logs
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.
References
Affected products
- <3.31.6
- ==3.32.0
Matching in nixpkgs
pkgs.calicoctl
Cloud native networking and network security
pkgs.cni-plugins
Some standard networking plugins, maintained by the CNI team
pkgs.dnsname-cni
DNS name resolution for containers
pkgs.calico-typha
Cloud native networking and network security
pkgs.confd-calico
Cloud native networking and network security
pkgs.calico-apiserver
Cloud native networking and network security
pkgs.calico-app-policy
Cloud native networking and network security
pkgs.calico-cni-plugin
Cloud native networking and network security
pkgs.calico-pod2daemon
Cloud native networking and network security
-
nixos-unstable pod2daemon-3.31.5
- nixpkgs-unstable pod2daemon-3.31.5
- nixos-unstable-small pod2daemon-3.31.5
-
nixos-25.11 pod2daemon-3.30.4
- nixos-25.11-small pod2daemon-3.30.4
- nixpkgs-25.11-darwin pod2daemon-3.30.4
pkgs.cni-plugin-flannel
Network fabric for containers designed to work in conjunction with flannel
-
nixos-unstable 1.9.1-flannel1
- nixpkgs-unstable 1.9.1-flannel1
- nixos-unstable-small 1.9.1-flannel1
-
nixos-25.11 1.8.0-flannel1
- nixos-25.11-small 1.8.0-flannel1
- nixpkgs-25.11-darwin 1.8.0-flannel1
Package maintainers
-
@wahjava Ashish SHUKLA <ashish.is@lostca.se>
-
@saschagrunert Sascha Grunert <mail@saschagrunert.de>
-
@vdemeester Vincent Demeester <vincent@sbr.pm>
-
@mikroskeem Mark Vainomaa <mikroskeem@mikroskeem.eu>