PT-2026-44409 · Tigera · Calico

Anthony Tam + 3 · Published 2026-05-28 · Updated 2026-05-28 · CVE-2026-41184

Mitre

CVSS v4.0

6.0

Medium

Base vector

AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L

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.

Fix

Insertion into Log File

Weakness Enumeration

CWE-532

Related Identifiers

CVE-2026-41184

Affected Products

Calico

References · 5

• https://github.com/projectcalico/calico/pull/12527 · Patch
• https://github.com/projectcalico/calico/pull/12502 · Patch
• https://github.com/projectcalico/calico/pull/12526 · Patch
• https://tigera.io/security-bulletins/tta-2026-001 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-41184 · Security Note