Name: CVE-2026-28176: Deserialization of Untrusted Data
Creator: Rapid7
Published: 2026-08-13T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-28176, CWE-502, CVSS 8.8, EPSS 0.00461

Unauthenticated PHP Object Injection in Booking Activities <= 1.18.4 versions.

CVSS Details

CVSS 3.1 Base Score: 8.8
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Booking Activities Plugin	—	Update booking-activities plugin to version 1.18.5, or a newer patched version	Aug 17, 2026	Aug 13, 2026

Prioritise with Active Threat Intelligence

With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.

Explore Intelligence Hub

MDR Buyer's Guide

Global Threat Landscape Report

Grow your business

CVSS Details

Covered by Rapid7

Prioritise with Active Threat Intelligence