Quick answers
- Is CVE-2026-66916 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-66916 being exploited in the wild.
- How severe is CVE-2026-66916?
- Informational severity, with a CVSS score of 7.5, published 22 August 2026.
- Which products and versions are affected?
- JoomGallery < 4.4.0.
- Is there a fix for CVE-2026-66916?
- A patch was published on 2026-08-22: JoomGallery 4.4.0 Feature/Safety Release Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-66916 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-66916?
- Check whether you run JoomGallery 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
This is an access control bypass vulnerability in JoomGallery's category view handler. When a gallery category is protected with a password, the HTML view correctly enforces the password gate. However, the JSON API endpoint (format=json parameter) fails to perform the same authorization check, allowing unauthenticated requests to retrieve protected category data in JSON format. The vulnerability is network-reachable without authentication or user interaction. An attacker can exploit this by appending format=json to category URLs to bypass the password protection entirely and access restricted image metadata and content. The vulnerability was patched in JoomGallery 4.4.0 (released 22 August 2026) and earlier patch releases.
Affected products
- JoomGallery JoomGallery < 4.4.0
Timeline
- 2026-08-22: disclosed: CVE-2026-66916 published; JoomGallery 4.4.0 released with patch
- 2026-08-22: patched: JoomGallery 4.4.0 Feature/Safety Release