CVE-2026-45090— Dalfox: Unauthenticated Remote DoS via Closed-Channel Write in `ParameterAnalysis` (server mode)
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I. Basic Information for CVE-2026-45090
Vulnerability Information
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Vulnerability Title
Dalfox: Unauthenticated Remote DoS via Closed-Channel Write in `ParameterAnalysis` (server mode)
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: NVD (National Vulnerability Database)
Vulnerability Title
dalfox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
dalfox是HAHWUL个人开发者的一款自动化跨站脚本扫描工具。 Dalfox 2.13.0之前版本存在安全漏洞，该漏洞源于ParameterAnalysis中两个工作阶段写入同一已关闭的results通道，可能导致Go运行时恐慌并崩溃整个dalfox进程。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-45090
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Patches & Fixes for CVE-2026-45090 (1)
- 🔗 Release v2.13.0 · hahwul/dalfox · GitHubx_refsource_MISC
Vendor Advisories for CVE-2026-45090 (1)
Same Patch Batch · hahwul · 2026-05-27 · 4 CVEs total
| CVE-2026-45087 | 10.0 CRITICAL | Dalfox: Unauthenticated Remote Code Execution via `found-action` in Dalfox Server Mode |
| CVE-2026-45089 | 8.2 HIGH | Dalfox: Unauthenticated Arbitrary File Create/Append via `output` Option in Dalfox Server |
| CVE-2026-45088 | 7.5 HIGH | Dalfox: Unauthenticated Arbitrary File Read with Out-of-Band Exfiltration via `custom-payl |
IV. Related Vulnerabilities
V. Comments for CVE-2026-45090
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