Quick answers
- Is CVE-2026-108903 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-108903 being exploited in the wild.
- How severe is CVE-2026-108903?
- Medium severity, with a CVSS score of 5.3, published 11 October 2026.
- Which products and versions are affected?
- pH7Software pH7Builder before 19.3.0.
- Is there a fix for CVE-2026-108903?
- Yes: fixed in 19.3.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-108903 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-108903?
- Check whether you run pH7Software pH7Builder 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: 19.3.0
Technical details
The vulnerability exists in the PFBC Form::isValid() validation method, which accepts a client-supplied form ID parameter without proper validation. An attacker can load a CAPTCHA-free form (such as login or search) and reuse its form ID when submitting to protected forms (contact, signup, comment, forum, invite) that normally require CAPTCHA validation. No authentication is required; the attack is purely network-based and relies on insufficient server-side form identity verification.
Affected products
- pH7Software pH7Builder before 19.3.0
Timeline
- 2026-10-11: disclosed
- 2026-10-11: advisory