Buffer overflow in Proftpd
CVE-2026-63090
ProFTPD before 1.3.9c and 1.3.10rc3 contains a heap-based buffer overflow vulnerability in the mod_sftp module that allows authenticated low-privilege attackers to achieve arbitrary code execution by sending crafted SFTP packet fragments e…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Proftpd — versions 0, 1.3.10rc1
Weakness classification (CWE)
References
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (release-notes, patch)
- disclosure@vulncheck.com (release-notes, patch)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-63090?
- CVE-2026-63090 is a high-severity vulnerability in Proftpd, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-07-20.
- How severe is CVE-2026-63090?
- High severity. CVSS v3 base score is 8.8 out of 10.