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Description

Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.

PUBLISHED Reserved 2025-11-10 | Published 2025-11-24 | Updated 2025-11-28 | Assigner certcc

Problem types

CWE-306: Missing Authentication for Critical Function

Product status

4.0.14
affected

4.1.1
affected

References

fluentbit.io/...d-in-fluent-bit-v4.1-and-backported-to-v4.0/

www.oligo.security/...-cloud-environments-to-remote-takeover

cve.org (CVE-2025-12969)

nvd.nist.gov (CVE-2025-12969)

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