Quick answers
- Is CVE-2026-107903 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-107903 being exploited in the wild.
- How severe is CVE-2026-107903?
- Informational severity, published 5 November 2026.
- Which products and versions are affected?
- Balbooa Gridbox < 2.20.5.0.
- Is there a fix for CVE-2026-107903?
- Yes: fixed in 2.20.5.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-107903 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-107903?
- Check whether you run Balbooa Gridbox 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: 2.20.5.0
Technical details
The vulnerability is a stored XSS flaw caused by inconsistent sanitization of user input in the reviews component of Gridbox. An attacker can inject malicious JavaScript code through the review submission mechanism, which is then persistently stored and executed in the context of other users' browsers. This affects versions prior to 2.20.5.0.
Affected products
- Balbooa Gridbox < 2.20.5.0