Fluent Bit telemetry agent flaws multiple vulnerabilities path traversal flaw (CVE-2025-12972)
Vulnerability
Summary
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Fluent Bit has five newly disclosed vulnerabilities that can be chained to compromise cloud and Kubernetes infrastructure, including remote code execution, log tampering, and telemetry injection. The set includes CVE-2025-12972, a path traversal flaw, plus buffer overflow, tag spoofing, improper input validation, and missing-authentication issues. The issues were fixed in 4.1.1 and 4.0.12, and operators are being told to update quickly and harden routing and file paths. In exposed deployments, the flaws could let an attacker rewrite logs, inject false events, and expand access deeper into the environment.
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Timeline
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24.11.2025 17:03 2 articles · 6mo ago
Five Fluent Bit vulnerabilities disclosed
Initial DisclosureResearchers disclosed five Fluent Bit vulnerabilities, including CVE-2025-12972, CVE-2025-12970, CVE-2025-12978, CVE-2025-12977, and CVE-2025-12969, that can enable authentication bypass, path traversal, remote code execution, denial of service, log tampering, and telemetry injection against cloud and Kubernetes deployments. CERT/CC said many of the flaws require network access to a Fluent Bit instance, and AWS urged operators to update to versions 4.1.1 and 4.0.12 and harden tag routing, output paths, read-only configuration mounts, and non-root execution.
Show sources
- New Fluent Bit Flaws Expose Cloud to RCE and Stealthy Infrastructure Intrusions — thehackernews.com — 24.11.2025 17:03
- New Fluent Bit Flaws Expose Cloud to RCE and Stealthy Infrastructure Intrusions — thehackernews.com — 24.11.2025 17:03