Is CVE-2026-103896 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-103896 being exploited in the wild.

How severe is CVE-2026-103896?

High severity, with a CVSS score of 7.5, published 16 October 2026.

Which products and versions are affected?

10Web Booster up to and including 2.34.5.

Is there a fix for CVE-2026-103896?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-103896 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-103896?

Check whether you run 10Web Booster 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.

CVE-2026-103896: 10Web Booster WordPress plugin path traversal file write

CVE-2026-103896 · Severity: high · CVSS 7.5 · Published 2026-10-16

The 10Web Booster plugin for WordPress, which optimizes website caching and performance, contains a vulnerability that allows unauthenticated attackers to create arbitrary directories and write cached files outside the intended cache folder. While attackers cannot execute code or write arbitrary content, they can poison cached pages and clutter the server filesystem with files.

Technologies: 10Web Booster. Vendors: 10Web.

Quick answers

Is CVE-2026-103896 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-103896 being exploited in the wild.
How severe is CVE-2026-103896?: High severity, with a CVSS score of 7.5, published 16 October 2026.
Which products and versions are affected?: 10Web Booster up to and including 2.34.5.
Is there a fix for CVE-2026-103896?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-103896 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-103896?: Check whether you run 10Web Booster 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.

Technical details

The OptimizerWebPageCache::get_cache_file_dir() function concatenates unsanitized $_GET parameter names and values directly into filesystem paths without validation, and calls mkdir() and file_put_contents() on the result. Unlike the delete_page_cache() function, no realpath containment check is performed. The file write is constrained to filenames of 'source.html' with rendered page content, preventing PHP execution.

Affected products

10Web Booster up to and including 2.34.5

Timeline

2026-10-16: disclosed

References

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