CVE-2026-6720Network attack vector

Cluster credential disclosure via verbose configuration logging

Published May 28, 2026 · Updated May 28, 2026

Information disclosure in Tigera Calico products allows attackers to extract cluster credentials from calicoctl stderr logs after verbose execution. At info or debug level, calicoctl logs the loaded client-configuration struct without redacting inline kubeconfig bearer tokens, API tokens, etcd passwords, or PEM keys. The default panic level is unaffected; exposure requires an operator to enable verbose logging and an attacker to read the captured stderr destination.

CVSS severity7.2
High
EPSS probability0.22%
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 products allows attackers to extract cluster credentials from calicoctl stderr logs after verbose execution. At info or debug level, calicoctl logs the loaded client-configuration struct without redacting inline kubeconfig bearer tokens, API tokens, etcd passwords, or PEM keys. The default panic level is unaffected; exposure requires an operator to enable verbose logging and an attacker to read the captured stderr destination.

The record

CVE
CVE-2026-6720
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Tigera
Product
Calico
Classifications
CWE-532, CWE-200, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <3.32.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tigera · Calicoversion=0 <3.32.0
Tigera · Calico Enterpriseversion=0 <3.21.7
Tigera · Calico Cloudversion=0 <22.4.0

Published CVSS scores

7.2TigeraCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

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-532Insertion of Sensitive Information into Log File
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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