What is CVE-2021-41186?

CVE-2021-41186 is a medium-severity vulnerability in Fluent Fluentd, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2021-10-29.

How severe is CVE-2021-41186?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Resource exhaustion in Fluent Fluentd

CVE-2021-41186

Fluentd collects events from various data sources and writes them to files to help unify logging infrastructure. The parser_apache2 plugin in Fluentd v0.14.14 to v1.14.1 suffers from a regular expression denial of service (ReDoS) vulnerabi…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.020 (78.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Fluent Fluentd — versions >= 0.14.14, < 1.14.2
Fluentd

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
security-advisories@github.com (x_refsource_MISC, Broken Link)

Frequently asked questions

What is CVE-2021-41186?: CVE-2021-41186 is a medium-severity vulnerability in Fluent Fluentd, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2021-10-29.
How severe is CVE-2021-41186?: Medium severity. CVSS v3 base score is 5.9 out of 10.