Vulnerability · Published Aug 19, 2026 · Assigned by M-Files Corporation
CVE-2026-18372CSS injection in M-Files Web
Medium 4.8
In plain English
A medium-severity cross-site scripting in M-Files Web from M-Files Corporation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 4.0)4.8Medium
Exploit odds (30 days)0.4%top 63.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
CSS injection vulnerability in M-Files Web before 26.8.16330.2 allows an authenticated vault administrator to inject arbitrary CSS, affecting the web user interface displayed to other vault users.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| M-Files Corporation | M-Files Web | 0 – before 26.8.16330.2 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
References
- https://empower.m-files.com/security-advisories/CVE-2026-18372 vendor-advisory