What’s Vulnerable › Vulnerabilities

CVE-2026-45087: Dalfox: Unauthenticated Remote Code Execution via `found-action` in Dalfox Server Mode

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 8.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-10-26
• Weakness: CWE-15

Description

Dalfox is a powerful open-source XSS scanner and utility focused on automation. Prior to 2.13.0, when dalfox is started in REST API server mode (dalfox server), the server binds to 0.0.0.0:6664 by default and requires no API key unless the operator explicitly passes --api-key. Because model.Options — including FoundAction and FoundActionShell — is deserialized directly from attacker-supplied JSON in POST /scan, and because dalfox.Initialize explicitly propagates those two fields into the final scan options without stripping them, any unauthenticated caller who can reach the server port can supply an arbitrary shell command that the dalfox process will execute on the host whenever a scan finding is triggered. This vulnerability is fixed in 2.13.0.

Affected products

• hahwul dalfox: before 2.13.0

References

• https://github.com/hahwul/dalfox/releases/tag/v2.13.0
• https://github.com/hahwul/dalfox/security/advisories/GHSA-v25v-m36w-jp4h
• https://github.com/hahwul/dalfox/security/advisories/GHSA-v25v-m36w-jp4h

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