Quick answers
- Is CVE-2026-88857 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-88857 being exploited in the wild.
- How severe is CVE-2026-88857?
- Informational severity, published 20 September 2026.
- Which products and versions are affected?
- OrdaSoft Joomla Gallery < 6.2.7.
- Is there a fix for CVE-2026-88857?
- 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-2026-88857 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-88857?
- Check whether you run OrdaSoft Joomla Gallery 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 saveWatermark() function in OrdaSoft Joomla Gallery accepts file uploads without extension validation, content-type checking, or filename sanitization, storing them in a web-accessible directory. An authenticated user with core.manage privileges can upload a PHP file with a spoofed image Content-Type header, then directly execute it via HTTP request. This is a post-authentication arbitrary file upload leading to remote code execution.
Affected products
- OrdaSoft Joomla Gallery < 6.2.7
Timeline
- 2026-09-20: disclosed