https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-07T10:17:37.444278+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2021-41186 CVE-2021-41186 — ReDoS vulnerability in parser_apache2 2026-10-07T10:17:37.474588+00:00

Affected: fluentd

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) vulnerability. A broken apache log with a certain pattern of string can spend too much time in a regular expression, resulting in the potential for a DoS attack. This issue is patched in version 1.14.2 There are two workarounds available. Either don't use parser_apache2 for parsing logs (which cannot guarantee generated by Apache), or put patched version of parser_apache2.rb into /etc/fluent/plugin directory (or any other directories specified by the environment variable `FLUENT_PLUGIN` or `--plugin` option of fluentd).

 https://cve.radiocsirt.org/vuln/ghsa-hwhf-64mh-r662 GHSA-hwhf-64mh-r662 — ReDoS vulnerability in parser_apache2 2026-10-07T10:17:37.474650+00:00

Affected: RubyGems: fluentd

### Impact parser_apache2 plugin in Fluentd v0.14.14 to v1.14.1 suffers from a regular expression denial of service (ReDoS) vulnerability. A broken apache log with a certain pattern of string can spend too much time in a regular expression, resulting in the potential for a DoS attack.

### Patches v1.14.2

### Workarounds Either of the following:

* Don't use parser_apache2 for parsing logs which cannot guarantee generated by Apache. * Put patched version of parser_apache2.rb into /etc/fluent/plugin directory (or any other directories specified by the environment variable `FLUENT_PLUGIN` or `--plugin` option of fluentd).

### References * [CVE-2021-41186](http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41186) * [GHSA-hwhf-64mh-r662](https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662) * [GHSL-2021-102](https://securitylab.github.com/advisories/GHSL-2021-102-fluent-fluentd/) * https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142