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Vulnerability record · CVE-2024-4323 · published 20 May 2024

CVE-2024-4323: Treasuredata fluent bit heap-based buffer overflow vulnerability

Treasuredata · Fluent Bit

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 requests and may result in denial of service conditions, information disclosure, or remote code execution.

9.8 CVSS 3.1 Critical EPSS 27% · top 2.0% CWE-122 · Heap-based buffer overflowCWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score
27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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 requests and may result in denial of service conditions, information disclosure, or remote code execution.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/fluent/fluent-bit/commit/9311b43a258352797af40749ab31a63c32acfd04 Patch
https://tenable.com/security/research/tra-2024-17 PatchThird Party Advisory
https://github.com/fluent/fluent-bit/commit/9311b43a258352797af40749ab31a63c32acfd04 Patch
https://tenable.com/security/research/tra-2024-17 PatchThird Party Advisory
https://www.vicarius.io/vsociety/posts/linguistic-lumberjack-memory-corruption-in-fluent-bit-cve-2024-4323 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-36088Treasuredata fluent bit double free vulnerabilityFluent 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).EPSS 2.4%9.1CVE-2025-12977Treasuredata fluent bit vulnerabilityFluent 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 …EPSS 0.73%8.8CVE-2025-12970Treasuredata fluent bit classic buffer overflow vulnerabilityThe extract_name function in Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer without validating length. An at…EPSS 1.0%7.8CVE-2021-46878Treasuredata fluent bit type confusion vulnerabilityAn 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 that inte…EPSS 0.35%7.8CVE-2021-46879Treasuredata fluent bit out-of-bounds write vulnerabilityAn 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 flb_msgpa…EPSS 0.38%7.8CVE-2020-35963Treasuredata fluent bit out-of-bounds write vulnerabilityflb_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 the maximum …EPSS 1.3%7.5CVE-2024-50608Treasuredata fluent bit null pointer dereference vulnerabilityAn 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 port, one ca…EPSS 1.1%7.5CVE-2024-50609Treasuredata fluent bit null pointer dereference vulnerabilityAn 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 can send a p…EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2024-4323), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.