CVE-2026-41184Network attack vector

ServiceAccount token disclosure via rendered CNI logs

Published May 28, 2026 · Updated May 28, 2026

Information disclosure in Tigera Calico before 3.31.6 allows remote authenticated users to read a ServiceAccount token from pod logs. The install-cni init container replaces SERVICEACCOUNT_TOKEN in Canal or Flannel-Calico CNI templates with a live bearer token, then writes the fully rendered configuration to standard output. Access requires pods/log permission in the calico-node namespace; the exposed token can patch pods/status cluster-wide, while kubeconfig-based deployments are unaffected.

CVSS severity6.5
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Tigera Calico before 3.31.6 allows remote authenticated users to read a ServiceAccount token from pod logs. The install-cni init container replaces SERVICEACCOUNT_TOKEN in Canal or Flannel-Calico CNI templates with a live bearer token, then writes the fully rendered configuration to standard output. Access requires pods/log permission in the calico-node namespace; the exposed token can patch pods/status cluster-wide, while kubeconfig-based deployments are unaffected.

The record

CVE
CVE-2026-41184
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Tigera
Product
Calico
Classifications
CWE-200, CWE-532, CAPEC-150, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.31.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tigera · Calicoversion=0 <3.31.6

Published CVSS scores

6.0TigeraCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L
6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-532Insertion of Sensitive Information into Log File
CAPEC-150Collect Data from Common Resource Locations
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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