Quick answers
- Is CVE-2026-15966 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-15966 being exploited in the wild.
- How severe is CVE-2026-15966?
- High severity, with a CVSS score of 7.5, published 23 July 2026.
- Which products and versions are affected?
- Progress MOVEit Transfer before 2025.1.5, 2026.0.0 before 2026.0.3.
- Is there a fix for CVE-2026-15966?
- A patch was published on 2026-07-22: Fix released in version 2026.0.3 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-15966 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-15966?
- Check whether you run Progress MOVEit Transfer 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
A permissive cross-domain security policy (CWE-942) exists in the Progress MOVEit Transfer WebUI. The application fails to properly restrict which external domains can interact with its resources, potentially allowing untrusted domains to bypass standard browser-based same-origin protections. An attacker could exploit this by enticing an authenticated user to visit a malicious website, which could then perform actions or retrieve data from the MOVEit Transfer instance on the user's behalf. The vulnerability is addressed in versions 2025.1.5 and 2026.0.3 by implementing security hardening to protect authenticated sessions against unintended cross-origin resource sharing.
Affected products
- Progress MOVEit Transfer before 2025.1.5, 2026.0.0 before 2026.0.3
Timeline
- 2026-07-22: patched: Fix released in version 2026.0.3
- 2026-07-23: disclosed: Initial advisory publication