Use of Uninitialized Resource Affecting thunderbird package, versions [,140.15)[150,153.2)[154,155)
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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Test your applications- Snyk IDSNYK-UNMANAGED-THUNDERBIRD-20886669
- published13 Oct 2026
- disclosed13 Oct 2026
- creditUnknown
Introduced: 13 Oct 2026
NewCVE-2026-84639 (opens in a new tab)How to fix?
Upgrade thunderbird to version 140.15, 153.2, 155 or higher.
Overview
Affected versions of this package are vulnerable to Use of Uninitialized Resource in the MIME parsing process. An attacker can potentially access sensitive information or cause application instability by triggering an error condition that leads to the use of uninitialized memory.