Access Control Bypass Affecting thunderbird package, versions [,140.8)[141.0-b1,148.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published26 Feb 2026
- disclosed24 Feb 2026
- creditUnknown
Introduced: 24 Feb 2026
CVE-2026-2784 (opens in a new tab)How to fix?
Upgrade thunderbird to version 140.8, 148.0 or higher.
Overview
Affected versions of this package are vulnerable to Access Control Bypass in the DOM: Security component. An attacker can gain unauthorized access to restricted resources by bypassing implemented mitigations through crafted web content.