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BREW-pgslice-CVE-2025-27219 — CGI has Denial of Service (DoS) potential in Cookie.parse

Affected: Homebrew: pgslice

There is a possibility for DoS by in the cgi gem. This vulnerability has been assigned the CVE identifier CVE-2025-27219. We recommend upgrading the cgi gem.

## Details

CGI::Cookie.parse took super-linear time to parse a cookie string in some cases. Feeding a maliciously crafted cookie string into the method could lead to a Denial of Service.

Please update CGI gem to version 0.3.5.1, 0.3.7, 0.4.2 or later.

## Affected versions

cgi gem versions <= 0.3.5, 0.3.6, 0.4.0 and 0.4.1.

## Credits

Thanks to lio346 for discovering this issue. Also thanks to mame for fixing this vulnerability.

Withdrawn: CLEANSTART-2026-BG72514 — Uncontrolled Recursion vulnerability in Apache Commons Lang

Withdrawn by the publisher.

Affected: CleanStart: logstash-fips

Multiple security vulnerabilities affect the logstash-fips package. Uncontrolled Recursion vulnerability in Apache Commons Lang. See references for individual vulnerability details.

CVE-2025-27219

Affected: ruby-lang CGI

In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Service (DoS) vulnerability. The method does not impose any limit on the length of the raw cookie value it processes. This oversight can lead to excessive resource consumption when parsing extremely large cookies.