GHSA-2j6q-whv2-gh6w
Low · 3.7CVSS
3.7
EPSS
—
Published
Mar 20, 2026
CISA due date
—
The record
h3: Missing Path Segment Boundary Check in `mount()` Causes Middleware Execution on Unrelated Prefix-Matching Routes
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | h3 | 2.0.1-alpha.0 | 2.0.1-rc.17 |
Related vulnerabilities
- CVE-2026-33490 H3 is a minimal H(TTP) framework. Same vulnerability
- GHSA-fp4x-ggrf-wmc6 H3 has an Open Redirect via Protocol-Relative Path in redirectBack() Referer Validation Also affects h3
- GHSA-q5pr-72pq-83v3 H3: Unbounded Chunked Cookie Count in Session Cleanup Loop may Lead to Denial of Service Also affects h3
- GHSA-4hxc-9384-m385 h3: SSE Event Injection via Unsanitized Carriage Return (`\r`) in EventStream Data and… Also affects h3
- GHSA-72gr-qfp7-vwhw h3: Double Decoding in `serveStatic` Bypasses `resolveDotSegments` Path Traversal… Also affects h3
- CVE-2026-33131 H3 is a minimal H(TTP) framework. Also affects h3
- CVE-2026-33128 H3 is a minimal H(TTP) framework. Also affects h3
- CVE-2026-33129 H3 is a minimal H(TTP) framework. Also affects h3