# CVE-2026-42167: proftpd-dfsg: mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenarios where...

CVE-2026-42167 is fixed in proftpd-dfsg on 1 platform, first by DEBIAN-CVE-2026-42167, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-42167
- Priority: High
- CVSS: 8.1 (high)
- EPSS: 0.0739
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 28, 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).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | proftpd-dfsg Debian 12.15 (bookworm) | 1.3.8+dfsg-4+deb12u5 | [DEBIAN-CVE-2026-42167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42167.md) | May 15, 2026 |
| Linux | proftpd-dfsg Debian 13.5 (trixie) | 1.3.8.c+dfsg-4+deb13u2 | [DEBIAN-CVE-2026-42167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42167.md) | May 15, 2026 |
| Linux | proftpd-dfsg Debian 14 | 1.3.9~dfsg-5 | [DEBIAN-CVE-2026-42167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42167.md) | May 15, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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