# activesupport (RubyGems) vulnerabilities Source: https://junglewise.ai/threats/technologies/activesupport Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/activesupport.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 20 vulnerabilities in activesupport (RubyGems): 2 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-126080, was published on 10 November 2026. Nothing was published in the last eight weeks. ## Counts - Last 7 days: 2 - Last 30 days: 2 - Last 90 days: 2 - All time: 20 (0 critical, 0 exploited in the wild) ## About activesupport (RubyGems) Ruby on Rails utility library providing extensions and helpers for common programming tasks. ## Latest activesupport (RubyGems) vulnerabilities - [CVE-2026-126080: Rails Active Support regular expression injection in safe_constantize](https://junglewise.ai/threats/cve-2026-126080-active-support-is-a-collection-of-utility-classes-and-standard) (high, CVSS 7.5, published 10 Nov 2026) - [CVE-2026-126075: Rails Active Support MessagePack unsafe serialization XSS](https://junglewise.ai/threats/cve-2026-126075-active-support-is-a-collection-of-utility-classes-and-standard) (medium, CVSS 4.7, published 10 Nov 2026) - [CVE-2026-33176: Rails Active Support has a possible DoS vulnerability in its number helpers](https://junglewise.ai/threats/cve-2026-33176-rails-active-support-has-a-possible-dos-vulnerability-in-its) (medium, CVSS 4, published 23 Mar 2026) - [CVE-2026-33170: Ruby on Rails Active Support XSS in SafeBuffer](https://junglewise.ai/threats/cve-2026-33170-ruby-on-rails-active-support-xss-in-safebuffer) (medium, CVSS 4, published 23 Mar 2026) - [CVE-2026-33169: Rails Active Support has a possible ReDoS vulnerability in number_to_delimited](https://junglewise.ai/threats/cve-2026-33169-rails-active-support-has-a-possible-redos-vulnerability-in-number) (medium, CVSS 4, published 23 Mar 2026) - [CVE-2023-38037: Active Support Possibly Discloses Locally Encrypted Files](https://junglewise.ai/threats/cve-2023-38037-active-support-possibly-discloses-locally-encrypted-files) (low, CVSS 3, published 23 Aug 2023) - [CVE-2023-28120: Possible XSS Security Vulnerability in SafeBuffer#bytesplice](https://junglewise.ai/threats/cve-2023-28120-possible-xss-security-vulnerability-in-safebuffer-bytesplice) (low, CVSS 3.1, published 15 Mar 2023) - [CVE-2023-22796: ReDoS based DoS vulnerability in Active Support's underscore](https://junglewise.ai/threats/cve-2023-22796-redos-based-dos-vulnerability-in-active-support-s-underscore) (info, published 18 Jan 2023) - [CVE-2020-8165: ActiveSupport potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore](https://junglewise.ai/threats/cve-2020-8165-activesupport-potentially-unintended-unmarshalling-of-user) (low, CVSS 3.1, published 26 May 2020) - [Moderate severity vulnerability that affects activesupport](https://junglewise.ai/threats/moderate-severity-vulnerability-that-affects-activesupport-ce7c04ad) (info, published 17 Sep 2018) - [CVE-2011-2197: rails Cross-site Scripting vulnerability](https://junglewise.ai/threats/cve-2011-2197-rails-cross-site-scripting-vulnerability) (info, published 24 Oct 2017) - [CVE-2011-2932: activesupport Cross-site Scripting vulnerability](https://junglewise.ai/threats/cve-2011-2932-activesupport-cross-site-scripting-vulnerability) (info, published 24 Oct 2017) - [CVE-2009-3086: actionpack and activesupport vulnerable to information leaks](https://junglewise.ai/threats/cve-2009-3086-actionpack-and-activesupport-vulnerable-to-information-leaks) (info, published 24 Oct 2017) - [CVE-2012-1098: activesupport Cross-site Scripting vulnerability](https://junglewise.ai/threats/cve-2012-1098-activesupport-cross-site-scripting-vulnerability) (info, published 24 Oct 2017) - [CVE-2009-3009: Cross site scripting that affects rails](https://junglewise.ai/threats/cve-2009-3009-cross-site-scripting-that-affects-rails) (info, published 24 Oct 2017) - [CVE-2013-0333: activesupport in Rails vulnerable to incorrect data conversion](https://junglewise.ai/threats/cve-2013-0333-activesupport-in-rails-vulnerable-to-incorrect-data-conversion) (info, published 24 Oct 2017) - [CVE-2012-3464: activesupport Cross-site Scripting vulnerability](https://junglewise.ai/threats/cve-2012-3464-activesupport-cross-site-scripting-vulnerability) (info, published 24 Oct 2017) - [CVE-2013-1856: activesupport Improper Input Validation vulnerability](https://junglewise.ai/threats/cve-2013-1856-activesupport-improper-input-validation-vulnerability) (info, published 24 Oct 2017) - [CVE-2015-3226: activesupport Cross-site Scripting vulnerability](https://junglewise.ai/threats/cve-2015-3226-activesupport-cross-site-scripting-vulnerability) (info, published 24 Oct 2017) - [CVE-2015-3227: activesupport vulnerable to Denial of Service via large XML document depth](https://junglewise.ai/threats/cve-2015-3227-activesupport-vulnerable-to-denial-of-service-via-large-xml) (info, published 24 Oct 2017) ## Most severe activesupport (RubyGems) vulnerabilities - [CVE-2026-126080: Rails Active Support regular expression injection in safe_constantize](https://junglewise.ai/threats/cve-2026-126080-active-support-is-a-collection-of-utility-classes-and-standard) (high, CVSS 7.5, published 10 Nov 2026) - [CVE-2026-126075: Rails Active Support MessagePack unsafe serialization XSS](https://junglewise.ai/threats/cve-2026-126075-active-support-is-a-collection-of-utility-classes-and-standard) (medium, CVSS 4.7, published 10 Nov 2026) - [CVE-2026-33176: Rails Active Support has a possible DoS vulnerability in its number helpers](https://junglewise.ai/threats/cve-2026-33176-rails-active-support-has-a-possible-dos-vulnerability-in-its) (medium, CVSS 4, published 23 Mar 2026) - [CVE-2026-33169: Rails Active Support has a possible ReDoS vulnerability in number_to_delimited](https://junglewise.ai/threats/cve-2026-33169-rails-active-support-has-a-possible-redos-vulnerability-in-number) (medium, CVSS 4, published 23 Mar 2026) - [CVE-2026-33170: Ruby on Rails Active Support XSS in SafeBuffer](https://junglewise.ai/threats/cve-2026-33170-ruby-on-rails-active-support-xss-in-safebuffer) (medium, CVSS 4, published 23 Mar 2026) - [CVE-2020-8165: ActiveSupport potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore](https://junglewise.ai/threats/cve-2020-8165-activesupport-potentially-unintended-unmarshalling-of-user) (low, CVSS 3.1, published 26 May 2020) - [CVE-2023-28120: Possible XSS Security Vulnerability in SafeBuffer#bytesplice](https://junglewise.ai/threats/cve-2023-28120-possible-xss-security-vulnerability-in-safebuffer-bytesplice) (low, CVSS 3.1, published 15 Mar 2023) - [CVE-2023-38037: Active Support Possibly Discloses Locally Encrypted Files](https://junglewise.ai/threats/cve-2023-38037-active-support-possibly-discloses-locally-encrypted-files) (low, CVSS 3, published 23 Aug 2023) - [CVE-2013-0333: activesupport in Rails vulnerable to incorrect data conversion](https://junglewise.ai/threats/cve-2013-0333-activesupport-in-rails-vulnerable-to-incorrect-data-conversion) (info, published 24 Oct 2017) - [CVE-2015-3227: activesupport vulnerable to Denial of Service via large XML document depth](https://junglewise.ai/threats/cve-2015-3227-activesupport-vulnerable-to-denial-of-service-via-large-xml) (info, published 24 Oct 2017) ## Vulnerabilities per week Nothing was published in the last eight weeks. | 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 | 0 | 0 | 0 | | 9 Nov 2026 | 2 | 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 - [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 - [publify_core (RubyGems)](https://junglewise.ai/threats/technologies/publify-core): 15 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, "activesupport (RubyGems) vulnerabilities", https://junglewise.ai/threats/technologies/activesupport, 13 November 2026.