What is CVE-2026-67607?

CVE-2026-67607 is a medium-severity vulnerability in Hfiref0x Lightftp, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.9/10. Published 2026-07-31.

How severe is CVE-2026-67607?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Hfiref0x Lightftp

CVE-2026-67607

LightFTP 2.3.1 contains a race condition vulnerability that allows remote attackers to crash the server by racing a fresh connection that reuses the FTP context against an in-progress ABRT cleanup. Attackers can exploit the unprotected re-…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Hfiref0x Lightftp — versions 0

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-67607?: CVE-2026-67607 is a medium-severity vulnerability in Hfiref0x Lightftp, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.9/10. Published 2026-07-31.
How severe is CVE-2026-67607?: Medium severity. CVSS v3 base score is 5.9 out of 10.