Treasuredata Fluent Bit — known CVE vulnerabilities

Every CVE whose affected-product data names Treasuredata Fluent Bit, ordered by CVSS severity, with EPSS exploit prediction and CISA KEV status.

CVEs (18)

• CVE-2024-4323 — CVSS 9.8 (critical): A memory corruption vulnerability in Fluent Bit versions 2.0.7 thru 3.0.3. This issue lies in the embedded http server’s parsing of trace…
• CVE-2021-36088 — CVSS 9.8 (critical): Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).
• CVE-2025-12977 — CVSS 9.1 (critical): Fluent Bit in_http, in_splunk, and in_elasticsearch input plugins fail to sanitize tag_key inputs. An attacker with network access or the…
• CVE-2025-12970 — CVSS 8.8 (high): The extract_name function in Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer without validating…
• CVE-2021-46879 — CVSS 7.8 (high): An issue was discovered in Treasure Data Fluent Bit 1.7.1, a wrong variable is used to get the msgpack data resulting in a heap overflow in…
• CVE-2021-46878 — CVSS 7.8 (high): An issue was discovered in Treasure Data Fluent Bit 1.7.1, erroneous parsing in flb_pack_msgpack_to_json_format leads to type confusion bug…
• CVE-2020-35963 — CVSS 7.8 (high): flb_gzip_compress in flb_gzip.c in Fluent Bit before 1.6.4 has an out-of-bounds write because it does not use the correct calculation of…
• CVE-2019-9749 — CVSS 7.5 (high): An issue was discovered in the MQTT input plugin in Fluent Bit through 1.0.4. When this plugin acts as an MQTT broker (server), it…
• CVE-2021-27186 — CVSS 7.5 (high): Fluent Bit 1.6.10 has a NULL pointer dereference when an flb_malloc return value is not validated by flb_avro.c or http_server/api/v1/metric…
• CVE-2024-23722 — CVSS 7.5 (high): In Fluent Bit 2.1.8 through 2.2.1, a NULL pointer dereference can be caused via an invalid HTTP payload with the content type of…
• CVE-2024-26455 — CVSS 7.5 (high): fluent-bit 2.2.2 contains a Use-After-Free vulnerability in /fluent-bit/plugins/custom_calyptia/calyptia.c.
• CVE-2024-50608 — CVSS 7.5 (high): An issue was discovered in Fluent Bit 3.1.9. When the Prometheus Remote Write input plugin is running and listening on an IP address and…
• CVE-2024-50609 — CVSS 7.5 (high): An issue was discovered in Fluent Bit 3.1.9. When the OpenTelemetry input plugin is running and listening on an IP address and port, one…
• CVE-2025-12969 — CVSS 6.5 (medium): Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration…
• CVE-2025-29477 — CVSS 5.5 (medium): An issue in fluent-bit v.3.7.2 allows a local attacker to cause a denial of service via the function consume_event.
• CVE-2025-29478 — CVSS 5.5 (medium): An issue in fluent-bit v.3.7.2 allows a local attacker to cause a denial of service via the cfl_list_size in cfl_list.h:165.
• CVE-2025-12978 — CVSS 5.4 (medium): Fluent Bit in_http, in_splunk, and in_elasticsearch input plugins contain a flaw in the tag_key validation logic that fails to enforce…
• CVE-2025-12972 — CVSS 5.3 (medium): Fluent Bit out_file plugin does not properly sanitize tag values when deriving output file names. When the File option is omitted, the…