CVE-2026-41184 ServiceAccount token disclosure via install-cni container logs
Attackers with pod log access can steal ServiceAccount tokens from Calico install-cni logs, enabling privilege escalation against cluster workloads.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41184?
CVE-2026-41184 is a medium-severity vulnerability in Tigera Calico, published on 28 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-532
Which versions are affected by CVE-2026-41184?
6 open source packages ship an affected version, including github.com/projectcalico/calico and github.com/projectcalico/calico/v3. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/projectcalico/calico Go | All versions | 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f |
github.com/projectcalico/calico Go | All versions | 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f |
github.com/projectcalico/calico Go | All versions | 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f |
github.com/projectcalico/calico Go | From 2.0.0 | 3.31.6 |
github.com/projectcalico/calico Go | From 2.0.0 | 3.31.6 |
github.com/projectcalico/calico/v3 Go | All versions | None |
Products include Tigera Calico.
How do I fix CVE-2026-41184?
Upgrade github.com/projectcalico/calico to a fixed version for your release line: 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f or 3.31.6.
Is CVE-2026-41184 being exploited?
There is no known exploitation of CVE-2026-41184 in the wild and no public exploit code.
Other vulnerabilities in Tigera Calico
- CVE-2026-6540 L7 policy bypass via unnormalized HTTP path matching
- CVE-2026-41187 Calico Tier Authorization Bypass via DeleteCollection
- CVE-2026-41186 Unauthenticated Go pprof exposure in Calico debug server
- CVE-2026-41185 ServiceAccount token disclosure via Azure IPAM CNI plugin logs
- CVE-2022-28224 Calico and Calico Enterprise may be vulnerable to route hijacking with the floating IP feature
Sources
Also known as GHSA-9p7w-w5q6-mxj3, GO-2026-5888, MINI-3v6x-pm82-mm8c, MINI-6gv7-x2v7-8x99, MINI-8fjf-pqgw-cxcq, MINI-jcpf-prg8-6276 and 3 more.