CVE-2026-77375
SFTPGo: Denial of service via malformed SSH channel request
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
SFTPGo: Denial of service via malformed SSH channel request
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.
- Record
CVE-2026-77375- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-129
- Updated
- 2026-11-02
EUVDEUVD-2026-98780
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.
- Record
EUVD-2026-98780- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-q7pc-356p-hggc
SFTPGo: Denial of service via malformed SSH channel request
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.
- Record
GHSA-q7pc-356p-hggc- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-129
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-77375- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-129
- Updated
- 2026-11-02
OSV
SFTPGo: Denial of service via malformed SSH channel request
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.
- Record
CVE-2026-77375- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-129
- Updated
- 2026-11-02
OSVGHSA-q7pc-356p-hggc
SFTPGo: Denial of service via malformed SSH channel request
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.
- Record
GHSA-q7pc-356p-hggc- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-129
- Updated
- 2026-11-02
OSVGO-2026-6792 No score
SFTPGo: Denial of service via malformed SSH channel request in github.com/drakkan/sftpgo
SFTPGo: Denial of service via malformed SSH channel request in github.com/drakkan/sftpgo
- Record
GO-2026-6792- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/drakkan/sftpgo/v2Go |
through 2.7.4 | 2.7.5 |
github.com/drakkan/sftpgo/v2Go |
before 2.7.5 | 2.7.5 |
github.com/drakkan/sftpgoGo |
All versions | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-77375 is a medium vulnerability (CVSS 6.5) in Drakkan Sftpgo, published October 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.31%, the 23rd percentile. Fixed in github.com/drakkan/sftpgo/v2 2.7.5.
References
github.com/drakkan/sftpgo/security/advisories/GHSA-q7pc-356p-hggc
nvd.nist.gov/vuln/detail/CVE-2026-77375