{"id":"CVE-2022-39379","aliases":["BIT-fluentd-2022-39379","GHSA-fppq-mj76-fpj2"],"url":"https://o3.security/vulnerability/CVE-2022-39379","summary":"Fluentd vulnerable to remote code execution due to insecure deserialization (in non-default configuration)","details":"Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. A remote code execution (RCE) vulnerability in non-default configurations of Fluentd allows unauthenticated attackers to execute arbitrary code via specially crafted JSON payloads. Fluentd setups are only affected if the environment variable `FLUENT_OJ_OPTION_MODE` is explicitly set to `object`. Please note: The option FLUENT_OJ_OPTION_MODE was introduced in Fluentd version 1.13.2. Earlier versions of Fluentd are not affected by this vulnerability. This issue was patched in version 1.15.3. As a workaround do not use `FLUENT_OJ_OPTION_MODE=object`.","published":"2022-11-02T00:00:00Z","modified":"2026-08-13T11:45:28.704159662Z","cvss":{"score":3.1,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.44708,"percentile":0.98711,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"fluentd","fixedVersion":"1.15.3"}],"fix":{"url":"https://github.com/fluent/fluentd/commit/48e5b85dab1b6d4c273090d538fc11b3f2fd8135","label":"fluent/fluentd@48e5b85"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39379.json"},{"type":"ADVISORY","url":"https://github.com/fluent/fluentd/security/advisories/GHSA-fppq-mj76-fpj2"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYD5QV66OLDHES6IKVYYM3Y3YID3VVCO/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-39379"},{"type":"FIX","url":"https://github.com/fluent/fluentd/commit/48e5b85dab1b6d4c273090d538fc11b3f2fd8135"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-13T11:45:28.704159662Z"}}