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EUVD-2026-322228

2026-10-07T17:01:20.764695+00:00

EUVD-2026-322228

fkie_cve-2026-45088

2026-10-07T17:01:20.764739+00:00

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 custom-payload-file field in model.Options is JSON-tagged and deserialized directly from the attacker's request body, then propagated unchanged through dalfox.Initialize into the scan engine. The engine passes the value to voltFile.ReadLinesOrLiteral, which reads lines from any file path accessible to the dalfox process and embeds each line as an XSS payload in outbound HTTP requests directed at the attacker-controlled target URL. Because the server has no API key by default, an unauthenticated network attacker can exfiltrate the contents of arbitrary files on the dalfox host by reading them line-by-line through scan traffic. This vulnerability is fixed in 2.13.0.

GHSA-35wr-x7v6-9fv2 — Dalfox Server Mode has an Unauthenticated Arbitrary File Read with Out-of-Band Exfiltration via `custom-payload-file`

2026-10-07T17:01:20.764778+00:00

Affected: Go: github.com/hahwul/dalfox/v2

## Summary

When dalfox is run in REST API server mode, the `custom-payload-file` field in `model.Options` is JSON-tagged and deserialized directly from the attacker's request body, then propagated unchanged through `dalfox.Initialize` into the scan engine. The engine passes the value to `voltFile.ReadLinesOrLiteral`, which reads lines from any file path accessible to the dalfox process and embeds each line as an XSS payload in outbound HTTP requests directed at the attacker-controlled target URL. Because the server has no API key by default, an unauthenticated network attacker can exfiltrate the contents of arbitrary files on the dalfox host by reading them line-by-line through scan traffic.

## Severity

**High** (CVSS 3.1: 7.5)

`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`

- **Attack Vector:** Network — server binds to `0.0.0.0:6664` by default; reachable by any network peer. - **Attack Complexity:** Low — no preconditions beyond network access; `skip-discovery` and `param` are both attacker-supplied, so the code path is fully under attacker control. - **Privileges Required:** None — `--api-key` defaults to `""`, so the auth middleware is not registered. - **User Interaction:** None. - **Scope:** Unchanged — the file read and the outbound HTTP exfiltration request both originate from the same dalfox process authority. - **Confidentiality Impact:** High — the attacker can read any file the dalfox process can open: private keys, configuration files containing database cr…