Fluent Bit vulnerabilities

2 known vulnerabilities in Fluent Bit from FluentBit. 2 are rated high or critical. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 9.1 Critical severity

  Fluent Bit: Improper Validation of Specified Type of Input

  CVE-2025-12977Nov 24, 2025FluentBit

  Fluent Bit in_http, in_splunk, and in_elasticsearch input plugins fail to sanitize tag_key inputs. An attacker with network access or the ability to write records into Splunk or Elasticsearch can supply tag_key values containing special characters such as newl

• 8.8 High severity

  Fluent Bit: Buffer Copy without Checking Size of Input

  CVE-2025-12970Nov 24, 2025FluentBitEPSS 1.07%

  The extract_name function in Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer,