Google Auth versions prior to 1.x-2.0.5.
Some issues were discovered in phpseclib 3.x before 3.0.36, which is included as part of the Google API PHP Client Library bundled with the Google Auth module. They make it possible for a denial of service attack.
Upgrade your site to the most recent version of Google Auth. Download available on the module page. No updates are necessary.
- Gthub Dependabot
- Jen Lampton of the Backdrop CMS Security Team