SQL Injection Affecting proftpd package, versions <1.3.9a-r0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-ALPINE322-PROFTPD-16321540
- published29 Apr 2026
- disclosed28 Apr 2026
Introduced: 28 Apr 2026
NewCVE-2026-42167 (opens in a new tab)How to fix?
Upgrade Alpine:3.22 proftpd to version 1.3.9a-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream proftpd package and not the proftpd package as distributed by Alpine.
See How to fix? for Alpine:3.22 relevant fixed versions and status.
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).
References
- http://www.proftpd.org/docs/RELEASE_NOTES-1.3.10rc1
- https://github.com/proftpd/proftpd/issues/2052
- https://zeropath.com/blog/proftpd-cve-2026-42167-auth-bypass-privesc-rce
- http://www.openwall.com/lists/oss-security/2026/05/01/4
- https://www.openwall.com/lists/oss-security/2026/05/01/4
- http://www.openwall.com/lists/oss-security/2026/05/01/13
- https://github.com/ZeroPathAI/proftpd-CVE-2026-42167-poc
- https://github.com/projectdiscovery/nuclei-templates/blob/main/network/cves/2026/CVE-2026-42167.yaml