Vulnerability Database

314,433

Total vulnerabilities in the database

CVE-2019-11728

The HTTP Alternative Services header, Alt-Svc, can be used by a malicious site to scan all TCP ports of any host that the accessible to a user when web content is loaded. This vulnerability affects Firefox < 68.

  • Published: Jul 23, 2019
  • Updated: Nov 9, 2025
  • CVE: CVE-2019-11728
  • Severity: Low
  • Exploit:

CVSS v3:

  • Severity: Low
  • Score: 4.7
  • AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS v2:

  • Severity: Low
  • Score: 4.3
  • AV:N/AC:M/Au:N/C:P/I:N/A:N

CWEs: