CVE-2018-18500
CRITICAL9.8EPSS 35.4%firefox-esr - security update
Published: 2/5/2019Modified: 4/28/2026
Description
A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.
Affected packages (4)
- Debian/firefox-esrfrom 0, < 60.5.0esr-1
- Debian/firefox-esrfrom 0, < 60.5.0esr-1~deb8u1
- Debian/firefox-esrfrom 0, < 60.5.0esr-1~deb9u1
- Debian/thunderbirdfrom 0, < 1:60.5.0-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |