SNOMED International Snowstorm reflected XSS
Priority LOW 12CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0032 25th percentileScored 2026-11-07
Fix Fixed Snowstorm (SNOMED International): 10.12.2, 10.9.3
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SNOMED International | Snowstorm | 7.0.0 to before 10.12.2 | 10.12.2, 10.9.3 | Patch available | CNA |
- Snowstorm VendorSNOMED International Affected 7.0.0 to before 10.12.2 Fixed in 10.12.2, 10.9.3 Patch available CNA
Remediation
- Fix · CNA Snowstorm (SNOMED International) Fixed in 10.12.2, 10.9.3
Timeline
- 2026-10-02 Threatist record created from CVE-2026-66300
- 2026-10-03 Alias added: GHSA-hc58-x27q-7xc8
Sources
- CVE-2026-66300 · CVE Program
- CVE-2026-66300 · NVD
- FIRST EPSS
- GHSA-hc58-x27q-7xc8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences