CVE-2026-66300
SNOMED International Snowstorm reflected XSS
MEDIUM
5
CVSS Score
Published: August 4, 2026 at 06:51 PM UTC
Updated: October 24, 2026 at 04:10 PM UTC
1 product affected across 1 vendorSnowstorm
Using Snowstorm by SNOMED International?
Get instant alerts when new vulnerabilities affect Snowstorm - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
Patch
Source: cverecord
https://github.com/IHTSDO/snowstorm/commit/575b555695811110dafe2fcea7dd2fd7e4bcee39Patch
Source: cverecord
https://github.com/IHTSDO/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6Third Party Advisory
Source: cverecord
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-212-01.jsonSSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
5MEDIUMcisa-cg
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- LOW
Vector?
Quick Info
StatusAWAITING ANALYSIS
CWE
CWE-79
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card