CVE-2026-58055: nghttp2 nghttpx - HTTP Request/Response Smuggling via Upgrade Request with Content-Length
Overview
- Severity
- Medium (CVSS 5.4)
- CVSS Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Jun
- Released
- 2026-06-29
- Last Updated
- 2026-07-09
- EPSS Score
- 0.26% (percentile: 18.1%)
Affected Products (4)
Other
- 21260-17084
- 21500-17084
- 21509-17084
- 21514-17084
Revision History
- 2026-06-29: Information published.
- 2026-06-29: Information published.
- 2026-07-01: Information published.
- 2026-07-03: Information published.
- 2026-07-09: Information published.