# Moderate severity vulnerability that affects activesupport

Source: https://junglewise.ai/threats/moderate-severity-vulnerability-that-affects-activesupport-ce7c04ad  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2018-09-17  
License: CC BY 4.0 with a link back

Severity: info · Published 2018-09-17

Moderate severity vulnerability that affects activesupport

Technologies: [activesupport (RubyGems)](https://junglewise.ai/threats/technologies/activesupport). Vendors: [RubyGems](https://junglewise.ai/threats/vendors/rubygems).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 17 September 2018.

**Which products and versions are affected?** activesupport (RubyGems) ECOSYSTEM:introduced=4.0.0,fixed=4.1.11.

**Is there a fix for This vulnerability?** Yes. activesupport (RubyGems): upgrade to 4.1.11 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run activesupport (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- activesupport (RubyGems): upgrade to 4.1.11 or later

  ```sh
  bundle update activesupport
  ```


## Affected products

- activesupport (RubyGems) ECOSYSTEM:introduced=4.0.0,fixed=4.1.11

## Related threats

- [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)
- [Rails Active Support MessagePack unsafe serialization XSS](https://junglewise.ai/threats/cve-2026-126075-active-support-is-a-collection-of-utility-classes-and-standard)
- [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)
- [Ruby on Rails Active Support XSS in SafeBuffer](https://junglewise.ai/threats/cve-2026-33170-ruby-on-rails-active-support-xss-in-safebuffer)
- [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)