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Findings

Vulnerability · CVE-2026-77375

SFTPGo: Denial of service via malformed SSH channel request

Published Oct 15, 2026 · corrected/updated Oct 15, 2026 · evidence confidence high

### 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.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2026-77375 is a medium public vulnerability record for this product. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether this product is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: github.com/drakkan/sftpgo/v2 (<= 2.7.4); github.com. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 6.5, EPSS 0.3%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-129. Sources contributing to this record: cve_org, epss, github, gitlab. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

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

Affected

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

Sources

References