Vulnerability · Published Aug 4, 2026 · Assigned by cisa-cg
CVE-2026-66300SNOMED International Snowstorm reflected XSS
Medium 5.0
In plain English
A medium-severity cross-site scripting in Snowstorm from SNOMED International. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).
Severity (CVSS 3.1)5.0Medium
Exploit odds (30 days)0.3%top 74.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
SNOMED International Snowstorm contains a reflected XSS vulnerability within the "Web Route" redirection functionality. An attacker can inject arbitrary JavaScript which will execute upon a target user navigating to a crafted, malicious link. Fixed in 10.12.2 and 10.9.3.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SNOMED International | Snowstorm | 7.0.0 – before 10.12.2 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L