Logging operator has Fluentd configuration injection that allows remote code execution

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54680
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-29 17:16:52 UTC
Updated2026-07-30 14:16:59 UTC
DescriptionLogging operator automates the deployment and configuration of Kubernetes logging pipelines. Prior to 6.6.0, the Fluentd configuration renderer FluentRender in pkg/sdk/logging/model/render/fluent.go writes CRD strings such as Flow record_transformer.records values directly into fluent.conf without escaping, allowing a user who can create Flow resources to inject a Fluentd <match **> block using @type exec and execute arbitrary commands inside the Fluentd aggregator. This issue is fixed in version 6.6.0.

Risk And Classification

Primary CVSS: v3.1 9.9 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.004260000 probability, percentile 0.350770000 (date 2026-08-01)

Problem Types: CWE-74 | CWE-77 | CWE-74 CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') | CWE-77 CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED9.9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Kube-logging Logging-operator affected < 6.6.0 Not specified

References

ReferenceSourceLinkTags
github.com/kube-logging/logging-operator/security/advisories/GHSA-mjqf-2... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/kube-logging/logging-operator/releases/tag/6.6.0 [email protected] github.com
github.com/kube-logging/logging-operator/commit/cf437d7f1e056c78740bf571... [email protected] github.com
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