CVE-2026-78265: Wordpress Unvalidated Wp Hash Serialized Object Injection

Base64-decoded serialized data is re-hashed using `wp_hash()` and assigned to a hash field without validating that the payload does not contain serialized PHP objects. This can allow attackers to bypass WordPress HMAC/hash integrity checks and achieve PHP Object Injection.

Provally CuratedPublic repositoryHighHigh confidenceVerifiedApache-2.0PHP
greprules fetch cve-2026-78265-wordpress-unvalidated-wp-hash-serialized-object-injection --engine opengrep

Description

Base64-decoded serialized data is re-hashed using `wp_hash()` and assigned to a hash field without validating that the payload does not contain serialized PHP objects. This can allow attackers to bypass WordPress HMAC/hash integrity checks and achieve PHP Object Injection.