Quick answers
- Is CVE-2026-42718 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-42718 being exploited in the wild.
- How severe is CVE-2026-42718?
- Critical severity, with a CVSS score of 9.8, published 10 October 2026.
- Which products and versions are affected?
- Booster For Woocommerce 8.4.0 and earlier.
- Is there a fix for CVE-2026-42718?
- Yes: fixed in 8.5.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-42718 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-42718?
- Check whether you run Booster For Woocommerce at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 8.5.0
Technical details
The vulnerability is a PHP Object Injection flaw in Booster for WooCommerce versions 8.4.0 and earlier that can be exploited without authentication. An attacker can manipulate serialized data to instantiate arbitrary PHP objects and trigger malicious behavior on the server, leading to remote code execution or data exposure.
Affected products
- Booster Booster for WooCommerce 8.4.0 and earlier
Timeline
- 2026-10-10: disclosed
- 2026-10-08: patched: Version 8.5.0 released