CVE-2026-42167

EUVD-2026-26157
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).
SQL Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
8.1 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 91%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
proftpdproftpd
1.3.7b ≤
𝑥
< 1.3.9a
CNA
Debian logo
Debian Releases
Debian Product
Codename
proftpd-dfsg
bookworm
1.3.8+dfsg-4+deb12u5
fixed
bookworm (security)
vulnerable
bullseye
vulnerable
bullseye (security)
vulnerable
forky
1.3.9b~dfsg-1
fixed
sid
1.3.9b~dfsg-1
fixed
trixie
1.3.8.c+dfsg-4+deb13u2
fixed
Common Weakness Enumeration
References
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