Executive brief
A vulnerability exists in the Firefox web browser's handling of copy-and-paste and drag-and-drop operations. While specific details are limited, such issues typically involve how data is transferred between web pages or the local system, potentially leading to unintended data exposure or security bypasses during user interaction. Users are advised to update to Firefox 153 or later to resolve this issue.
Technical details
A vulnerability was identified in the Mozilla Firefox DOM: Copy & Paste and Drag & Drop component. The flaw is categorized by Mozilla as having 'moderate' impact, though specific technical root causes (such as memory corruption or logic errors) are not publicly detailed in the advisory. An attacker could potentially leverage this flaw through a malicious website that interacts with the user's clipboard or drag-and-drop actions. The vulnerability is tracked as CVE-2026-16378 and was fixed in Firefox 153. Access to the underlying Bugzilla report (Bug 2038868) is currently restricted.
Affected products
- Mozilla Firefox < 153
Timeline
- 2026-07-21: advisory: Mozilla Foundation Security Advisory 2026-68 published.
- 2026-07-21: patched: Fixed in Firefox 153.