CVE-2026-45090
HighSummary
Dalfox, an XSS scanning tool, has a vulnerability prior to version 2.13.0 that causes a runtime panic due to the use of a closed results channel. This bug can lead to the entire Dalfox process crashing.
Risk Assessment
This vulnerability can be remotely exploited by unauthorized users, leading to a crash of the Dalfox server when running in server mode. The default configuration does not require an API key, increasing the risk.
Recommendation
It is recommended to update Dalfox to version 2.13.0 or later to mitigate this vulnerability. Additionally, consider implementing API authorization to enhance security.
Original NVD description (English source)
Dalfox is a powerful open-source XSS scanner and utility focused on automation. Prior to 2.13.0, ParameterAnalysis in pkg/scanning/parameterAnalysis.go runs two sequential worker stages that both write to the same results channel. The channel is correctly closed after the first stage completes (close(results) at line 438), but the second stage — which processes POST-body parameters (dp) — is then launched with the same already-closed channel as its output. When a scanned parameter is reflected, processParams executes results <- paramResult on the closed channel, triggering a Go runtime panic that crashes the entire dalfox process. In server mode, the crash is remotely triggerable by any unauthenticated caller who can reach the REST API, because the default configuration has no API key and the second stage activates whenever options.Data != "" (i.e., the attacker supplies the data field) and the target reflects at least one parameter. This vulnerability is fixed in 2.13.0.