CVE-2026-106601: Jetpack authentication bypass vulnerability
medium 5.4 published 2026-10-09
- Affected versions
- 16.2 and older
- Fixed in
- 16.3
- Latest version
- 16.3.1
- Severity
- Medium · CVSS 5.4
- Active installs
- 3+ million
- Type
- Authentication bypass
What an attacker needs
- Access: None. No account or login is needed (per the CVSS score).
CVSS vector (score by Patchstack): CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
What to do now
- Update Jetpack to 16.3 or newer (the latest is 16.3.1): Dashboard → Updates, or Plugins → “update now”.
- If you cannot update right away, deactivate it until you can.
- Turn on auto-updates for it: Plugins → “Enable auto-updates” on its row.
- Not sure which version you run? Check your version against every known Jetpack issue.
With WP-CLI:
wp plugin get jetpack --field=version. - If you ran an affected version and something looks off (new admin users, spam pages, redirects), run the free scan below.
The advisory
Authentication Bypass Using an Alternate Path or Channel vulnerability in Automattic Jetpack jetpack allows Password Recovery Exploitation.This issue affects Jetpack: from n/a through 16.2.
References
- NVD CVE-2026-106601 nvd.nist.gov
- Patchstack advisory patchstack.com
Related
Ran an affected version? Check your site for signs of a hack
The free scan reads the public side of your site and looks for spam pages, hidden redirects, injected scripts and blacklist entries. No login, no install, about a minute.
Where this data comes from
- CVE record, score and references: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
- Versions and install counts: wordpress.org/plugins/jetpack (Plugins API), fetched 2026-11-01.
- The summary, “what an attacker needs” and “what to do” sections are our plain-English reading of the record and the plugin's release history; the quoted description is the record's own text. Spot an error? Email Daniel.