# cgi (RubyGems) vulnerabilities Source: https://junglewise.ai/threats/technologies/cgi Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/cgi.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 6 vulnerabilities in cgi (RubyGems): 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-120641, was published on 4 November 2026. 1 vulnerability in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 1 - All time: 6 (0 critical, 0 exploited in the wild) ## About cgi (RubyGems) Ruby gem providing CGI (Common Gateway Interface) support for Ruby applications. ## Latest cgi (RubyGems) vulnerabilities - [CVE-2026-120641: CGI for Perl path traversal in upload filenames](https://junglewise.ai/threats/cve-2026-120641-cgi-versions-before-5-00-for-perl-return-upload-filenames-with) (info, published 4 Nov 2026) - [CVE-2025-27220: CGI has Regular Expression Denial of Service (ReDoS) potential in Util#escapeElement](https://junglewise.ai/threats/cve-2025-27220-cgi-has-regular-expression-denial-of-service-redos-potential-in) (low, CVSS 3.1, published 3 Mar 2025) - [CVE-2025-27219: CGI has Denial of Service (DoS) potential in Cookie.parse](https://junglewise.ai/threats/cve-2025-27219-cgi-has-denial-of-service-dos-potential-in-cookie-parse) (low, CVSS 3.1, published 3 Mar 2025) - [CVE-2021-33621: HTTP response splitting in CGI](https://junglewise.ai/threats/cve-2021-33621-http-response-splitting-in-cgi) (low, CVSS 3.1, published 19 Nov 2022) - [CVE-2021-41819: Cookie Prefix Spoofing in CGI::Cookie.parse](https://junglewise.ai/threats/cve-2021-41819-cookie-prefix-spoofing-in-cgi-cookie-parse) (low, CVSS 3.1, published 21 Jan 2022) - [CVE-2021-41816: Buffer overrun in CGI.escape_html](https://junglewise.ai/threats/cve-2021-41816-buffer-overrun-in-cgi-escape-html) (low, CVSS 3.1, published 14 Dec 2021) ## Most severe cgi (RubyGems) vulnerabilities - [CVE-2021-41816: Buffer overrun in CGI.escape_html](https://junglewise.ai/threats/cve-2021-41816-buffer-overrun-in-cgi-escape-html) (low, CVSS 3.1, published 14 Dec 2021) - [CVE-2021-41819: Cookie Prefix Spoofing in CGI::Cookie.parse](https://junglewise.ai/threats/cve-2021-41819-cookie-prefix-spoofing-in-cgi-cookie-parse) (low, CVSS 3.1, published 21 Jan 2022) - [CVE-2021-33621: HTTP response splitting in CGI](https://junglewise.ai/threats/cve-2021-33621-http-response-splitting-in-cgi) (low, CVSS 3.1, published 19 Nov 2022) - [CVE-2025-27219: CGI has Denial of Service (DoS) potential in Cookie.parse](https://junglewise.ai/threats/cve-2025-27219-cgi-has-denial-of-service-dos-potential-in-cookie-parse) (low, CVSS 3.1, published 3 Mar 2025) - [CVE-2025-27220: CGI has Regular Expression Denial of Service (ReDoS) potential in Util#escapeElement](https://junglewise.ai/threats/cve-2025-27220-cgi-has-regular-expression-denial-of-service-redos-potential-in) (low, CVSS 3.1, published 3 Mar 2025) - [CVE-2026-120641: CGI for Perl path traversal in upload filenames](https://junglewise.ai/threats/cve-2026-120641-cgi-versions-before-5-00-for-perl-return-upload-filenames-with) (info, published 4 Nov 2026) ## Vulnerabilities per week 1 vulnerability in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 1 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other RubyGems technologies - [actionpack (RubyGems)](https://junglewise.ai/threats/technologies/actionpack): 77 vulnerabilities - [nokogiri (RubyGems)](https://junglewise.ai/threats/technologies/nokogiri): 69 vulnerabilities - [rack (RubyGems)](https://junglewise.ai/threats/technologies/rack): 55 vulnerabilities - [activerecord (RubyGems)](https://junglewise.ai/threats/technologies/rubygems-activerecord): 26 vulnerabilities - [rubygems-update (RubyGems)](https://junglewise.ai/threats/technologies/rubygems-update): 25 vulnerabilities - [puppet (RubyGems)](https://junglewise.ai/threats/technologies/puppet): 23 vulnerabilities - [activesupport (RubyGems)](https://junglewise.ai/threats/technologies/activesupport): 20 vulnerabilities - [actionview (RubyGems)](https://junglewise.ai/threats/technologies/actionview): 19 vulnerabilities - [activestorage (RubyGems)](https://junglewise.ai/threats/technologies/activestorage): 19 vulnerabilities - [camaleon_cms (RubyGems)](https://junglewise.ai/threats/technologies/camaleon-cms): 19 vulnerabilities - [rails-html-sanitizer (RubyGems)](https://junglewise.ai/threats/technologies/rails-html-sanitizer): 18 vulnerabilities - [loofah (RubyGems)](https://junglewise.ai/threats/technologies/loofah): 17 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "cgi (RubyGems) vulnerabilities", https://junglewise.ai/threats/technologies/cgi, 13 November 2026.