Quick answers
- Is CVE-2026-77826 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77826 being exploited in the wild.
- How severe is CVE-2026-77826?
- High severity, with a CVSS score of 8.8, published 5 September 2026.
- Which products and versions are affected?
- RegistrationMagic RegistrationMagic 5.0.1.8 through 6.0.9.8.
- Is there a fix for CVE-2026-77826?
- A patch was published on 2026-09-03: Fixed in version 6.0.9.9 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-77826 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-77826?
- Check whether anything you run is named in the advisory. 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.
Technical details
This is an authentication bypass vulnerability in the Facebook single sign-on (SSO) integration. The root cause is the missing verification of the "audience" claim in Facebook access tokens before accepting them as proof of identity. Attackers can obtain a Facebook access token (from any source) and use it to log in as an existing user or create a new account without a valid invitation, bypassing both registration restrictions and the Facebook login button setting. The vulnerability requires network access to the WordPress login endpoint and no prior authentication, but an attacker must possess or be able to obtain a valid Facebook token. The plugin was patched in version 6.0.9.9.
Affected products
- RegistrationMagic RegistrationMagic 5.0.1.8 through 6.0.9.8
Timeline
- 2026-09-03: disclosed
- 2026-09-03: patched: Fixed in version 6.0.9.9