CVE-2016-1939: Mozilla Firefox

Medium severity, CVSS 5.3. EPSS: 1.8% chance of exploitation in the next 30 days.

Mozilla Firefox before 44.0 stores cookies with names containing vertical tab characters, which allows remote attackers to obtain sensitive information by reading HTTP Cookie headers. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-7208.

Affected products

• Mozilla Firefox: up to and including 43.0.4
• Opensuse Leap: version 42.1 only
• Opensuse Opensuse: version 13.1 only; version 13.2 only

Published 2016-01-31. Last modified 2026-06-17.