Ech0 before 4.4.3 Stored XSS via SVG Upload

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Affected scope and exposure questions

The current feed maps lin-snow/Ech0 (generic). Check affected ranges and fixed versions before updating.

Recommended response

1. 1Check inventory. Check lockfiles and deployed manifests for lin-snow/Ech0.
2. 2Review the reported fix. Update lin-snow/Ech0 to 4.4.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

1. Published upstream

   Aug 25, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

2. Source modified

   Aug 25, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

3. First seen by HOL

   Aug 25, 2026

Sources and claim methodology

• GitHub security advisorygithub.com
• Source referencevulncheck.com

Related CVEs

• Ech0 before 5.0.1 Denial of Service via Accept-LanguageSame lin-snow/ech0 package
• Ech0 before 4.7.3 Server-Side Request Forgery via fetchPeerConnectInfoSame lin-snow/ech0 package
• Ech0 before 4.7.3 Email Disclosure via Public APISame lin-snow/ech0 package
• Ech0 before 4.7.3 Unauthenticated fav_count ModificationSame lin-snow/ech0 package
• Ech0 before 4.7.3 OAuth Redirect URI Validation BypassSame lin-snow/ech0 package
• Ech0 before 4.7.3 Stored XSS via RSS feed tag namesSame lin-snow/ech0 package