CVE-2026-4688 is a critical use-after-free vulnerability within the Disability Access APIs component, allowing for a sandbox escape in affected versions of Mozilla Firefox, Firefox ESR, and Thunderbird. With a CVSS score of 10.0 CRITICAL, this flaw can be exploited remotely over a network with low complexity, leading to a complete compromise of confidentiality, integrity, and availability. Despite its severe impact, there is currently no evidence of active exploitation, public exploit code availability, or significant community attention for this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 140.9.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* | ||
< 149.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.