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CVE-2026-43861 Details
Description
mutt before 2.3.2 does not check for '\0' in url_pct_decode.
A vulnerability exists in Mutt versions prior to 2.3.2, where the URL decoding function does not properly handle null byte characters. This oversight could potentially lead to unexpected behavior or security issues by allowing null bytes to be embedded in decoded URLs.
Users can upgrade to Mutt version 2.3.2 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 4, 2026Exploitation: NoneAutomatable: NoTechnical Impact: Partial
CISA-ADP
Assessed May 4, 2026Exploitation: NoneAutomatable: NoTechnical Impact: Partial
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/muttmua/mutt/commit/12f54fe3b61f761c096fe95e95d5e3072af00ed2 | [email protected] | Source CodeVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-158 | Improper Neutralization of Null Byte or NUL Character | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mutt | < 2.3.2 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 4, 2026 | New CVE Received | [email protected] |