Is CVE-2022-39379 actively exploited?

No active exploitation of CVE-2022-39379 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-39379 be exploited remotely?

Yes. CVE-2022-39379 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-39379?

CVE-2022-39379 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2022-39379

CRITICAL

CVE-2022-39379

CWE-502Published: November 2, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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`.

NVD Source

Technical Analysis

CVE-2022-39379 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.