CVE-2026-86251: Schwachstellen-Eintrag (NVD)
h3 versions before 1.15.9 contain a path traversal vulnerability in the serveStatic utility. A double-decoding flaw allows a request path containing double-encoded dot sequences (e.g. %252e%252e) to be decoded to %2e%2e, which survives resolveDotSegments() because that function only checks for literal '.' characters. When the resulting asset ID is resolved by URL-based backends (CDN, S3, object storage), %2e%2e is interpreted as '..' per RFC 3986, enabling path traversal to read arbitrary files from the backend.
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📊 Historien-Charts — Criticals-Trend · Vendors · EPSS-Verteilung
| Tier | 2026-08-29 | 2026-09-06 |
|---|---|---|
| ≥90 % | 4 | 0 |
| ≥50 % | 4 | 0 |
| ≥10 % | 3 | 0 |
| <10 % | 304 | 300 |
CVE-2026-86251 | h3js h3 up to 1.15.8 serveStatic utility resolveDotSegments path traversal (EUVD-2026-72107)
A vulnerability classified as problematic has been found in h3js h3 up to 1.15.8. This impacts the function resolveDotSegments of the component serveStatic utility. The manipulation leads to path traversal. This vulnerability is traded as C