SNOMED International Snowstorm reflected XSS
Summary
| CVE | CVE-2026-66300 |
|---|---|
| State | PUBLISHED |
| Assigner | cisa-cg |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-04 19:16:51 UTC |
| Updated | 2026-08-04 20:16:52 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 2.3 LOW from 9119a7d8-5eab-497f-8521-727c672e3725
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | 9119a7d8-5eab-497f-8521-727c672e3725 | Secondary | 2.3 | LOW | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | DECLARED | 2.3 | LOW | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N |
| 3.1 | 9119a7d8-5eab-497f-8521-727c672e3725 | Secondary | 5 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L |
| 3.1 | CNA | DECLARED | 5 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
PresentPrivileges Required
NoneUser Interaction
PassiveConfidentiality
LowIntegrity
LowAvailability
LowSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
RequiredScope
UnchangedConfidentiality
LowIntegrity
LowAvailability
LowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | SNOMED International | Snowstorm | affected 7.0.0 10.12.2 custom | Not specified |
| CNA | SNOMED International | Snowstorm | unaffected 10.12.2 | Not specified |
| CNA | SNOMED International | Snowstorm | unaffected 10.9.3 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/IHTSDO/snowstorm/commit/575b555695811110dafe2fcea7dd2fd7e4bcee39 | 9119a7d8-5eab-497f-8521-727c672e3725 | github.com | |
| www.cve.org/CVERecord | 9119a7d8-5eab-497f-8521-727c672e3725 | www.cve.org | |
| github.com/IHTSDO/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6 | 9119a7d8-5eab-497f-8521-727c672e3725 | github.com | |
| raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-212-01.json | 9119a7d8-5eab-497f-8521-727c672e3725 | raw.githubusercontent.com | |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Michael Milkovich, CISA (en)
CNA: Karl Meister, CISA (en)
There are currently no legacy QID mappings associated with this CVE.