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Vulnerabilities

Vulnerability · CVE-2026-77375

SFTPGo: Denial of service via malformed SSH channel request

Published Oct 15, 2026 · catalog updated Oct 15, 2026 · SFTPGo: Denial of service

Check if you run it

No confirmed exploitation is on record for CVE-2026-77375. EPSS is 0.31%. Act only if a listed version of SFTPGo: Denial of service is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (SFTPGo: Denial of service).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Version ranges on file
Affected products
go github.com/drakkan/sftpgo/v2 · golang github.com

### Summary A flaw in the SSH service allows an authenticated client to crash the server by sending a malformed protocol message while opening a channel. ### Impact Any user able to authenticate over SSH can trigger an unhandled error condition that aborts the server process. This results in a denial of service affecting all connected users until the service is restarted. No confidentiality or integrity impact has been identified; the issue is limited to availability.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • go github.com/drakkan/sftpgo/v2<= 2.7.4
  • golang github.comversion unspecified

How to fix CVE-2026-77375

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-77375. EPSS is 0.31%. Act only if a listed version of SFTPGo: Denial of service is installed.

Which versions are affected?

Compare what you have installed with <= 2.7.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-129: Improper Validation of Array Index. EPSS 0.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 15, 2026 · GitLab Advisory Database

    Detected

    A flaw in the SSH service allows an authenticated client to crash the server by sending a malformed protocol message while opening a channel.

  2. Oct 15, 2026 · GitHub Advisory Database

    Updated

    ### Summary A flaw in the SSH service allows an authenticated client to crash the server by sending a malformed protocol message while opening a channel. ### Impact Any user able to authenticate over SSH can trigger an unhandled error condition that aborts the server process. This results in a denial of service affecting all connected users until the service is restarted. No confidentiality or int

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.