CVE-2026-119568

vsftpd through 3.0.5 require_ssl_reuse Bypass via FTPS Data Channel Hijacking

State: Published
Severity: 9.1 Critical
Published: Oct 30, 2026
Updated: Oct 30, 2026
Reserved: Oct 30, 2026

Description

vsftpd through 3.0.5 contains an authentication bypass vulnerability in ssl_data_accept() that allows unauthenticated attackers to hijack FTPS data connections by resuming their own TLS session ticket. Attackers sharing the victim's source IP can obtain a ticket via AUTH TLS, then connect to the victim's PASV port to steal downloads or inject upload data.

Scores

CVSS	Score	Vector	Source
4.0	9.1 Critical	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	7.4 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	VulnCheck

Weaknesses

CWE-940 Improper Verification of Source of a Communication Channel

Affected Products

Product	Versions
vsftpdvsftpd	3.0.5 and earlierAffected

References

https://abraxaslabs.tech/research/vsftpd-ssl-data-any-ticketthird-party-advisory
https://security.appspot.com/vsftpd.htmlproduct
VulnCheck Advisory: vsftpd through 3.0.5 require_ssl_reuse Bypass via FTPS Data Channel Hijackingthird-party-advisory

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