Quick answers
- Is CVE-2026-103522 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103522 being exploited in the wild.
- How severe is CVE-2026-103522?
- High severity, with a CVSS score of 7.2, published 12 October 2026.
- Which products and versions are affected?
- Thelia 2.6.0.
- Is there a fix for CVE-2026-103522?
- 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-2026-103522 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-103522?
- Check whether you run Thelia 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
CVE-2026-103522 affects the banner upload endpoint in Thelia v2.6.0, which performs insufficient file type validation by trusting only client-supplied MIME types without server-side verification. An authenticated administrator can upload a PHP file with a spoofed image MIME type to bypass validation and achieve remote code execution on the underlying server. This is a file upload vulnerability requiring administrative privileges and network access to the admin interface.
Affected products
- Thelia Thelia 2.6.0
Timeline
- 2026-10-12: disclosed