CVE-2026-31817 HIGH

CVE-2026-31817: OliveTin's unsafe parsing of UniqueTrackingId can be used to write files

Vendor Olivetin
Product OliveTin
Weakness CWE-22 · Path traversal
Published March 10, 2026
Last update March 11, 2026

CVSS base score

8.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

What the vulnerability does

01Description

OliveTin gives access to predefined shell commands from a web interface. Prior to 3000.11.2, when the saveLogs feature is enabled, OliveTin persists execution log entries to disk. The filename used for these log files is constructed in part from the user-supplied UniqueTrackingId field in the StartAction API request. This value is not validated or sanitized before being used in a file path, allowing an attacker to use directory traversal sequences (e.g., ../../../) to write files to arbitrary locations on the filesystem. This vulnerability is fixed in 3000.11.2.

Key dates

02Disclosure timeline

March 10, 2026 CVE published
March 11, 2026 Record updated