drakkan SFTPGo up to 2.7.3 Symbolic Link access control

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k1.27

Summaryinfo

A vulnerability, which was classified as critical, has been found in drakkan SFTPGo up to 2.7.3. The affected element is an unknown function of the component Symbolic Link Handler. This manipulation causes access control. This vulnerability appears as CVE-2026-10031. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in drakkan SFTPGo up to 2.7.3. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Symbolic Link Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

SFTPGo prior to 2.7.4 contains a permission bypass vulnerability that allows authenticated users to circumvent per-directory access controls by creating symbolic links in a permitted directory that point to files in directories where download, upload, or overwrite permissions are denied. Attackers can exploit the create_symlinks permission combined with read and write access in one directory to read or modify files in restricted directories, as operations are authorized against the link's directory permissions rather than the dereferenced target's directory permissions.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-10031 since 05/28/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 2.7.4 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SFTPGo 2.7.4

Timelineinfo

05/28/2026 CVE reserved
07/30/2026 +63 days VulDB entry created
07/31/2026 +0 days Advisory disclosed
07/31/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-10031 (🔒)
GCVE (CVE): GCVE-0-2026-10031
GCVE (VulDB): GCVE-100-384973

Entryinfo

Created: 07/31/2026 01:28
Changes: 07/31/2026 01:28 (55)
Complete: 🔍
Cache ID: 216::103

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