Threat Intelligence Database

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.

CVE-2026-45090 is a race condition vulnerability in hahwul dalfox versions prior to 2.13.0. The issue arises because two sequential worker stages write to the same results channel, which is closed after the first stage, causing the second stage to write to a closed channel. This triggers a Go runtime panic that crashes the dalfox process. In server mode, this crash can be remotely triggered by unauthenticated callers via the REST API if the default configuration is used without an API key and the attacker supplies POST-body data that is reflected by the target. The vulnerability is fixed in version 2.13.0.