CVE-2016-5276 is a critical use-after-free vulnerability in the mozilla::a11y::DocAccessible::ProcessInvalidationList function, affecting Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird before 45.4. This flaw, triggered by a crafted aria-owns attribute, allows remote attackers to execute arbitrary code or cause a denial of service through heap memory corruption. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector and low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 48.0.2CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | ||
45.1.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:45.1.0:*:*:*:*:*:*:* | ||
45.1.1CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:45.1.1:*:*:*:*:*:*:* | ||
45.2.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:45.2.0:*:*:*:*:*:*:* | ||
45.3.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:45.3.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.