Observable Response Discrepancy in WPGraphQL - CVE-2026-54768
Published: September 2, 2026
Vulnerability identifier: #VU146818
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54768
CWE-ID: CWE-204
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to observable response discrepancy in the deprecated user field of SendPasswordResetEmailPayload when handling sendPasswordResetEmail mutation requests with a supplied username or email address. A remote attacker can send a specially crafted GraphQL mutation to disclose sensitive information.
The issue can be used to determine whether a supplied username or email belongs to an existing user, and for existing author-class users it can expose public profile fields through the returned User object.
Affected software
WPGraphQL
How to mitigate CVE-2026-54768
Install security update from vendor's website.
WPGraphQL - update to 2.15.1