CVE-2026-42167
high
CVSS v3
8.1
CVSS v4 NEW
—
VIR risk
8.1
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).
Predictions
Exploit likelihood
88%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 1.3.8+dfsg-4+deb12u5 |
| debian | bullseye | affected | |
| debian | forky | fixed | 1.3.9~dfsg-5 |
| debian | sid | fixed | 1.3.9~dfsg-5 |
| debian | trixie | fixed | 1.3.8.c+dfsg-4+deb13u2 |
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://www.suse.com/security/cve/CVE-2026-42167.html
- https://security-tracker.debian.org/tracker/CVE-2026-42167
CWEs
CWE-89
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.