Cross-Site Scripting (XSS) in SNOMED International Snowstorm (CVE-2026-66300)
Summary
Cross-site scripting in SNOMED International Snowstorm (CVE-2026-66300). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 10.12.2 or later.
Original description
The description as published by the source.
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.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-66300 has been found in SNOMED International Snowstorm.
Risk of unauthorized operations or information disclosure. CVSS score: 5.0/10.
What to do: upgrade SNOMED International Snowstorm to 10.12.2 or later.
If unsure, ask your IT team or search "SNOMED International Snowstorm CVE-2026-66300" on the vendor's site.
CVE-2026-66300 (SNOMED International Snowstorm) — CWE-79 / CVSS v3 5.0
Attack vector: remote (network-reachable) / unauthenticated
Patched: 10.12.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in SNOMED International Snowstorm.
Check the vendor advisory for the affected versions of SNOMED International Snowstorm.
Severity: Medium (CVSS 5.0/10). Risk of unauthorized operations or information disclosure.
Update to 10.12.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで SNOMED International Snowstorm を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade SNOMED International Snowstorm to 10.12.2ステージング環境で 10.12.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- advisory raw.githubusercontent.com
- advisory cve.org
- advisory nvd.nist.gov
- advisory github.com
- patch github.com
- patch github.com
- web github.com