CVE-2026-53674

HighCVSS 7.1/10Last modified Jul 23, 2026

Description

BuddyPress 14.4.0 contains a regular expression injection vulnerability in the activity mention resolver that, when username compatibility mode is enabled, allows attackers to manipulate a REGEXP database clause by crafting mention names containing regex metacharacters. Attackers can submit @mentions whose metacharacters pass through esc_sql unescaped and are inserted into an unprepared REGEXP query against the users table, enabling boolean-based inference of usernames and denial of service through catastrophic backtracking.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

Weakness enumeration

CWE-943

Affected software

No affected versions have been published.

Timeline

Published: Jun 10, 2026
Last modified: Jul 23, 2026
NVD status: Deferred

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