Path Traversal Vulnerability in Outline Service
CVE-2026-25062

5.5MEDIUM

Key Information:

Vendor

Outline

Status
Outline
Vendor
CVE Published:
11 February 2026

What is CVE-2026-25062?

The Outline Service, which facilitates collaborative documentation, was found to have a vulnerability in its JSON import process prior to version 1.4.0. Specifically, the service inadequately handled the value of attachments[].key from the imported JSON, allowing an attacker to exploit this oversight. By injecting path traversal sequences or absolute paths, an attacker could gain access to arbitrary files on the server through the file system, leading to potential data exposure. This critical issue has been addressed in version 1.4.0 of the Outline Service.

Affected Version(s)

outline < 1.4.0

References

https://github.com/outline/outline/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/outline/outline/releases/tag/v1.4.0
x_refsource_MISC

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.