Summaryinfo

A vulnerability labeled as critical has been found in Sanster IOPaint 1.5.3. The affected element is the function _get_file of the file iopaint/file_manager/file_manager.py of the component File Manager. Executing a manipulation of the argument filename can lead to path traversal. This vulnerability appears as CVE-2026-5258. The attack may be performed from remote. In addition, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability classified as critical was found in Sanster IOPaint 1.5.3. This vulnerability affects the function _get_file of the file iopaint/file_manager/file_manager.py of the component File Manager. The manipulation of the argument filename with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-5258. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1006.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-17821). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Sanster

Name

• IOPaint

Version

• 1.5.3

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Threat Intelligenceinfo

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Entryinfo

Submitinfo

Accepted

• Submit #780666: Sanster IOPaint 1.5.3 Path Traversal - Arbitrary File Read (by Yu_Bao)

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