# CVE-2020-36599: OmniAuth's `lib/omniauth/failure_endpoint.rb` does not escape `message_key` value

Source: https://junglewise.ai/threats/cve-2020-36599-omniauth-s-lib-omniauth-failure-endpoint-rb-does-not-escape  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-08-19  
License: CC BY 4.0 with a link back

CVE-2020-36599 · Severity: low · CVSS 3.1 · Published 2022-08-19

OmniAuth's `lib/omniauth/failure_endpoint.rb` does not escape `message_key` value

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

## Quick answers

**Is CVE-2020-36599 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-36599 being exploited in the wild.

**How severe is CVE-2020-36599?** Low severity, with a CVSS score of 3.1, published 19 August 2022.

**Which products and versions are affected?** omniauth (RubyGems) ECOSYSTEM:introduced=0,fixed=1.9.2.

**Is there a fix for CVE-2020-36599?** Yes. omniauth (RubyGems): upgrade to 1.9.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2020-36599?** Check whether you run omniauth (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

- omniauth (RubyGems): upgrade to 1.9.2 or later

  ```sh
  bundle update omniauth
  ```


## Affected products

- omniauth (RubyGems) ECOSYSTEM:introduced=0,fixed=1.9.2

## Identifiers

- CVE-2020-36599
- GHSA-pm55-qfxr-h247

## Related threats

- [OmniAuth host header injection in callback URL](https://junglewise.ai/threats/cve-2026-63183-omniauth-is-a-flexible-authentication-system-utilizing-rack)
- [OmniAuth Ruby gem Cross-site Request Forgery in request phase](https://junglewise.ai/threats/cve-2015-9284-omniauth-ruby-gem-cross-site-request-forgery-in-request-phase)
- [Omniauth allows POST parameters to be stored in session](https://junglewise.ai/threats/cve-2017-18076-omniauth-allows-post-parameters-to-be-stored-in-session)