CVE-2026-43861: mutt before 2.3.2 does not check for '\0' in url_pct_decode

Low severity · published May 4, 2026

CVE-2026-43861

mutt before 2.3.2 does not check for '\0' in url_pct_decode

3.7

CVSS

0.2%

EPSS

On KEV

Description

mutt before 2.3.2 does not check for '\0' in url_pct_decode.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack vector

Network

Complexity

High

Privileges

None

User interaction

None

Confidentiality

None

Integrity

Low

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.2% · higher than 5% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

before 2.3.2 · source: vendor

Affected product

mutt

References