Response header name interning does not have same-origin protections and these headers are stored in a global registry. This allows stored header names to be available cross-origin. This vulnerability affects Firefox < 55.
https://www.mozilla.org/security/advisories/mfsa2017-18/
http://www.securitytracker.com/id/1039124
Source: Mitre, NVD
Published: 2018-06-11
Updated: 2018-07-30
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity: High