XSS Vulnerability in Dalfox Utility Affecting Open-Source Scanning Tool
CVE-2026-45090

7.5HIGH

Key Information:

Vendor

Hahwul

Status
Dalfox
Vendor
CVE Published:
27 May 2026

What is CVE-2026-45090?

Dalfox, a powerful open-source XSS scanning utility, is susceptible to an issue in its parameter analysis implementation prior to version 2.13.0. The problem arises when two sequential worker stages attempt to write to the same results channel. Following the completion of the first stage, the channel is closed, but the second stage, which processes POST-body parameters, still relies on this closed channel. If an attacker can reflect a scanned parameter, it may trigger a panic in the Go runtime, causing the entire Dalfox process to crash. This vulnerability can be exploited remotely in server mode by any unauthenticated user who interacts with the REST API, making it a significant security concern. The issue 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:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.