{"cve":"CVE-2026-45090","nvd":{"published":"2026-05-27T18:16:25.003","modified":"2026-10-26T11:10:00.157","status":"Deferred","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-362","CWE-404"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-26T11:33:08.859761529+00:00"},"epss":{"cve":"CVE-2026-45090","score":0.00231,"percentile":0.13817,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-2g4x-fq3j-cgq4","url":"https://osv.dev/vulnerability/GHSA-2g4x-fq3j-cgq4","summary":"Dalfox has an Unauthenticated Remote DoS via Closed-Channel Write in `ParameterAnalysis` (server mode)","modified":"2026-06-08T20:15:13.755373484Z","packages":[{"ecosystem":"Go","name":"github.com/hahwul/dalfox/v2","purl":"pkg:golang/github.com/hahwul/dalfox/v2","ranges":["<2.13.0"],"fixed":["2.13.0"]},{"ecosystem":"Go","name":"github.com/hahwul/dalfox","purl":"pkg:golang/github.com/hahwul/dalfox","ranges":["<=1.2.2"],"fixed":[]}]},{"id":"GO-2026-4999","url":"https://osv.dev/vulnerability/GO-2026-4999","summary":"Dalfox has an Unauthenticated Remote DoS via Closed-Channel Write in `ParameterAnalysis` (server mode) in github.com/hahwul/dalfox","modified":"2026-05-20T19:30:12.984597072Z","packages":[{"ecosystem":"Go","name":"github.com/hahwul/dalfox","purl":"pkg:golang/github.com/hahwul/dalfox","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/hahwul/dalfox/v2","purl":"pkg:golang/github.com/hahwul/dalfox/v2","ranges":["<2.13.0"],"fixed":["2.13.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}