vulnerability
MFSA2023-45 Firefox: Security Vulnerabilities fixed in Firefox 119 (CVE-2023-5722)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:P/I:N/A:N) | Oct 24, 2023 | Oct 25, 2023 | Mar 27, 2026 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
Oct 24, 2023
Added
Oct 25, 2023
Modified
Mar 27, 2026
Description
Using iterative requests an attacker was able to learn the size of an opaque response, as well as the contents of a server-supplied Vary header. This vulnerability affects Firefox < 119.
Solution
mozilla-firefox-upgrade-119_0
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.