CVE-2026-66300: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in SNOMED International Snowstorm
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.
AI Analysis
Technical Summary
CVE-2026-66300 is a reflected cross-site scripting (CWE-79) vulnerability in SNOMED International's Snowstorm product. The issue exists in the Web Route redirection functionality, where user input is not properly neutralized, enabling injection of arbitrary JavaScript code. This code executes in the context of the victim's browser when they navigate to a maliciously crafted URL. The vulnerability has been addressed in Snowstorm versions 10.12.2 and 10.9.3.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary JavaScript in the context of the victim's browser, potentially leading to information disclosure, session hijacking, or other client-side impacts. The CVSS score of 5.0 reflects limited impact due to the requirement for user interaction and high attack complexity.
Mitigation Recommendations
The vulnerability is fixed in Snowstorm versions 10.12.2 and 10.9.3. Users and administrators should upgrade to these or later versions to remediate the issue. No other vendor advisories or temporary mitigations are provided. Patch status is confirmed by the vendor's fixed versions.
CVE-2026-66300: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in SNOMED International Snowstorm
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.
CVSS v3.1
Score 5.0medium
Affected software
pkg:github/ihtsdo/snowstormRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-66300 is a reflected cross-site scripting (CWE-79) vulnerability in SNOMED International's Snowstorm product. The issue exists in the Web Route redirection functionality, where user input is not properly neutralized, enabling injection of arbitrary JavaScript code. This code executes in the context of the victim's browser when they navigate to a maliciously crafted URL. The vulnerability has been addressed in Snowstorm versions 10.12.2 and 10.9.3.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary JavaScript in the context of the victim's browser, potentially leading to information disclosure, session hijacking, or other client-side impacts. The CVSS score of 5.0 reflects limited impact due to the requirement for user interaction and high attack complexity.
Mitigation Recommendations
The vulnerability is fixed in Snowstorm versions 10.12.2 and 10.9.3. Users and administrators should upgrade to these or later versions to remediate the issue. No other vendor advisories or temporary mitigations are provided. Patch status is confirmed by the vendor's fixed versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisa-cg
- Date Reserved
- 2026-07-24T15:58:38.179Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7237f0bf8831d53948833f
Added to database: 08/04/2026, 19:05:20 UTC
Last enriched: 08/04/2026, 19:17:15 UTC
Last updated: 08/04/2026, 19:28:22 UTC
Views: 4
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