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CVE-2026-28149

CRITICAL NVD

CVSS Score 9.8

Severity CRITICAL

Published Aug 13, 2026

Vendor unknown

Description

Unauthenticated PHP Object Injection in Headless Single Sign On <= 1.6 versions.

References

https://patchstack.com/database/wordpress/plugin/headless-single-sign-on/vulnerability/wordpress-headless-single-sign-on-plugin-1-6-php-object-injection-vulnerability?_s_id=cve