CVE-2026-10031Network attack vectorHinoki check available

Restricted file access via symlink dereference

Published Jul 30, 2026 · Updated Jul 30, 2026

Incorrect authorization in SFTPGo before 2.7.4 allows remote authenticated users to read or modify restricted files through symlinks. Per-directory authorization checks the directory containing the requested link, then file operations dereference that link and act on a target whose directory denies the operation. Exploitation requires create_symlinks plus read and write access in one directory and remains within the same account's configured storage root.

CVSS severity4.2
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect authorization in SFTPGo before 2.7.4 allows remote authenticated users to read or modify restricted files through symlinks. Per-directory authorization checks the directory containing the requested link, then file operations dereference that link and act on a target whose directory denies the operation. Exploitation requires create_symlinks plus read and write access in one directory and remains within the same account's configured storage root.

The record

CVE
CVE-2026-10031
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
SOFTWARE ENGINEERING S.R.L.
Product
SFTPGo
Classifications
CWE-863
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.7.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SOFTWARE ENGINEERING S.R.L. · SFTPGoversion=0 <2.7.4

Published CVSS scores

2.3VulnCheckCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
4.2GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo