CVE-2026-66418
OpenClaw Dashboard v3.0.0 Stored XSS via Failed Login Username Field
Description
OpenClaw Dashboard v3.0.0 contains a stored cross-site scripting vulnerability that allows unauthenticated remote attackers to inject arbitrary HTML and script payloads by submitting a crafted username in a failed login POST request, which is recorded verbatim in the audit log. When an administrator opens the notification panel, the unescaped log entry is rendered via innerHTML with a permissive Content-Security-Policy allowing inline event handlers, enabling the attacker-supplied payload to execute in the administrator's session and interact with authenticated endpoints including agent instruction file editing and configuration changes.
INFO
Published Date :
July 30, 2026, 9:18 p.m.
Last Modified :
Sept. 3, 2026, 8:01 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-66418
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Sanitize user-supplied data before logging.
- Update the Content-Security-Policy to restrict inline scripts.
- Apply patches or updates from OpenClaw.
- Validate audit log rendering for script execution.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-66418.
| URL | Resource |
|---|---|
| https://github.com/theopaid/Unauthenticated-Stored-Cross-Site-Scripting-Leading-To-Administrator-Account-Takeover | Exploit Mitigation Third Party Advisory |
| https://github.com/tugcantopaloglu/openclaw-dashboard | Product |
| https://www.vulncheck.com/advisories/openclaw-dashboard-stored-xss-via-failed-login-username-field | Exploit Third Party Advisory |
| https://github.com/theopaid/Unauthenticated-Stored-Cross-Site-Scripting-Leading-To-Administrator-Account-Takeover | Exploit Mitigation Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-66418 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-66418
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-66418 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-66418 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 03, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:tugcantopaloglu:openclaw_agent_dashboard:*:*:*:*:*:*:*:* versions up to (including) 3.0.0 Added Reference Type VulnCheck: https://github.com/theopaid/Unauthenticated-Stored-Cross-Site-Scripting-Leading-To-Administrator-Account-Takeover Types: Exploit, Mitigation, Third Party Advisory Added Reference Type VulnCheck: https://github.com/tugcantopaloglu/openclaw-dashboard Types: Product Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/openclaw-dashboard-stored-xss-via-failed-login-username-field Types: Exploit, Third Party Advisory Added Reference Type CISA-ADP: https://github.com/theopaid/Unauthenticated-Stored-Cross-Site-Scripting-Leading-To-Administrator-Account-Takeover Types: Exploit, Mitigation, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 31, 2026
Action Type Old Value New Value Added Reference https://github.com/theopaid/Unauthenticated-Stored-Cross-Site-Scripting-Leading-To-Administrator-Account-Takeover Added SSVC {'id': 'CVE-2026-66418', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-31T23:11:18.614582Z'} -
New CVE Received by [email protected]
Jul. 30, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'tugcantopaloglu', 'product': 'openclaw-dashboard', 'versions': [{'status': 'affected', 'version': '3.0.0', 'versionType': 'custom'}], 'defaultStatus': 'affected'}] Added Description OpenClaw Dashboard v3.0.0 contains a stored cross-site scripting vulnerability that allows unauthenticated remote attackers to inject arbitrary HTML and script payloads by submitting a crafted username in a failed login POST request, which is recorded verbatim in the audit log. When an administrator opens the notification panel, the unescaped log entry is rendered via innerHTML with a permissive Content-Security-Policy allowing inline event handlers, enabling the attacker-supplied payload to execute in the administrator's session and interact with authenticated endpoints including agent instruction file editing and configuration changes. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N Added CWE CWE-79 Added Reference https://github.com/theopaid/Unauthenticated-Stored-Cross-Site-Scripting-Leading-To-Administrator-Account-Takeover Added Reference https://github.com/tugcantopaloglu/openclaw-dashboard Added Reference https://www.vulncheck.com/advisories/openclaw-dashboard-stored-xss-via-failed-login-username-field