Medium 5.0Published Aug 4, 2026

CVE-2026-66300SNOMED International Snowstorm reflected XSS

Updated under an hour ago (Oct 27, 2026, 6:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for SNOMED International Snowstorm

Exploited in the last 30 days

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: 5.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: cisa-cg
NVD analysis: Awaiting Analysis
Record last updated: Aug 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

SNOMED International Snowstorm snomed_international:snowstorm (from the name)	from 7.0.0 before 10.12.2; 10.12.2 not affected; 10.9.3 not affected	CNA record

References

References

https://github.com/IHTSDO/snowstorm/commit/575b555695811110dafe2fcea7dd2fd7e4bcee39	patch
https://github.com/IHTSDO/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6	patch
https://www.cve.org/CVERecord?id=CVE-2026-66300	vdb-entry
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-212-01.json	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.