Remote Code Execution Vulnerability in Dalfox XSS Scanner
CVE-2026-45087

10CRITICAL

Key Information:

Vendor

Hahwul

Status
Dalfox
Vendor
CVE Published:
27 May 2026

What is CVE-2026-45087?

An unauthenticated remote code execution vulnerability exists in the Dalfox XSS scanner when run in REST API server mode. By default, the server binds to all interfaces (0.0.0.0:6664) and does not require an API key unless specified. This allows any unauthorized user to send specially crafted JSON payloads to the server through the POST /scan endpoint. The deserialization of these inputs, without proper validation, enables an attacker to execute arbitrary shell commands on the host system whenever a scan finding occurs. The vulnerability has been addressed in version 2.13.0.

Affected Version(s)

dalfox < 2.13.0

References

https://github.com/hahwul/dalfox/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/hahwul/dalfox/releases/tag/v2.13.0
x_refsource_MISC

CVSS V3.1

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.