Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/hahwul/dalfox/releases/tag/v2.13.0
- https://github.com/hahwul/dalfox/security/advisories/GHSA-2g4x-fq3j-cgq4
- https://github.com/hahwul/dalfox/security/advisories/GHSA-2g4x-fq3j-cgq4
FAQ
What is CVE-2026-45090?
CVE-2026-45090 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 writ...
How severe is CVE-2026-45090?
CVE-2026-45090 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45090?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.