CVE-2026-42167

Severity CVSS v4.0:

Pending analysis

Type:

CWE-89 SQL Injection

Publication date:

28/04/2026

Last modified:

01/05/2026

Description

mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows commands (e.g., COPY TO PROGRAM).

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.10 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.10

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

http://www.proftpd.org/docs/RELEASE_NOTES-1.3.10rc1
https://github.com/ZeroPathAI/proftpd-CVE-2026-42167-poc
https://github.com/proftpd/proftpd/issues/2052
https://www.openwall.com/lists/oss-security/2026/05/01/4
https://zeropath.com/blog/proftpd-cve-2026-42167-auth-bypass-privesc-rce
http://www.openwall.com/lists/oss-security/2026/05/01/13
http://www.openwall.com/lists/oss-security/2026/05/01/4
https://github.com/ZeroPathAI/proftpd-CVE-2026-42167-poc