hahwul dalfox up to 2.12.x REST API Server Mode file inclusion

Summaryinfo

A vulnerability was found in hahwul dalfox up to 2.12.x. It has been declared as critical. This affects an unknown function of the component REST API Server Mode. Executing a manipulation can lead to file inclusion. The identification of this vulnerability is CVE-2026-45089. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in hahwul dalfox up to 2.12.x and classified as critical. This vulnerability affects some unknown processing of the component REST API Server Mode. The manipulation with an unknown input leads to a file inclusion vulnerability. The CWE definition for the vulnerability is CWE-73. The product allows user input to control or influence paths or file names that are used in filesystem operations. As an impact it is known to affect integrity, and availability. CVE summarizes:

Dalfox is a powerful open-source XSS scanner and utility focused on automation. Prior to 2.13.0, when dalfox is run in REST API server mode, the output, output-all, and debug fields in model.Options are JSON-tagged and deserialized directly from the attacker's request body, then propagated unchanged through dalfox.Initialize into the scan engine's logging path. The logger opens the attacker-supplied path with os.O_APPEND|os.O_CREATE|os.O_WRONLY and writes scan log lines to it. Critically, this file write block lives outside the IsLibrary guard in DalLog, so it executes even in server/library mode where file output was never intended to operate. Because no API key is required in the default configuration, an unauthenticated network caller can create or append to any file writable by the dalfox process on the host filesystem. This vulnerability is fixed in 2.13.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-45089 since 05/08/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.13.0 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

• hahwul

Name

• dalfox

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12

Website

• Product: https://github.com/hahwul/dalfox/

CPE 2.3info

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