Use of Uninitialized Variable Affecting thunderbird package, versions [,158.0.1)
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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- published20 Oct 2026
- disclosed20 Oct 2026
- creditUnknown
Introduced: 20 Oct 2026
NewCVE-2026-113868 (opens in a new tab)How to fix?
Upgrade thunderbird to version 158.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Use of Uninitialized Variable in the NTLM authentication process for POP3 and SMTP servers when the server's challenge is not validated as proper base64. An attacker can access uninitialized heap memory or cause a crash by sending a specially crafted challenge, such as one consisting only of base64 padding.