Improper Neutralization of Null Byte or NUL Character Affecting mutt package, versions [,2.3.2)
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-MUTT-16414774
- published4 May 2026
- disclosed4 May 2026
- creditUnknown
Introduced: 4 May 2026
NewCVE-2026-43859 (opens in a new tab)How to fix?
Upgrade mutt to version 2.3.2 or higher.
Overview
Affected versions of this package are vulnerable to Improper Neutralization of Null Byte or NUL Character due to improper use of the strfcpy function instead of memcpy in the IMAP authentication process. An attacker can potentially manipulate authentication data by exploiting this improper function usage.