Quick answers
- Is CVE-2026-109234 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-109234 being exploited in the wild.
- How severe is CVE-2026-109234?
- High severity, with a CVSS score of 7.2, published 31 October 2026.
- Which products and versions are affected?
- Meow Lightbox up to and including 5.6.4.
- Is there a fix for CVE-2026-109234?
- 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-2026-109234 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-109234?
- Check whether you run Meow Lightbox 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
Stored cross-site scripting in the post_content parameter of bbPress reply submissions due to insufficient input sanitization and output escaping. Exploitation requires administrator configuration of Output Buffering, HtmlDomParser engine, and Aggressive Resolve, combined with a stored-HTML submission surface (such as bbPress anonymous replies) that preserves img attributes in its kses allow-list. An unauthenticated attacker can inject arbitrary JavaScript that executes in the context of users viewing the affected page.
Affected products
- Meow Lightbox up to and including 5.6.4
Timeline
- 2026-10-31: disclosed