# CVE-2026-66418: OpenClaw Dashboard v3.0.0 Stored XSS via Failed Login Username Field

> Unauthenticated attackers can inject scripts via login attempts that execute in admin sessions, enabling privilege escalation and configuration changes.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 30 Jul 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-jgjm-xq9g-p8xp

## What is CVE-2026-66418?

CVE-2026-66418 is a critical cross-site scripting vulnerability in tugcantopaloglu openclaw-dashboard, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-66418?

It affects 1 product.


Products: Tugcantopaloglu Openclaw Agent Dashboard.

## How do I fix CVE-2026-66418?

No fix has been published for CVE-2026-66418 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-66418 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-66418 exists.

Public exploit code:

- Security Advisory: Unauthenticated Stored Cross-Site Scripting Leading To Administrator Account Takeover (openclaw-dashboard) (github_poc): https://github.com/theopaid/CVE-2026-66418-OpenClaw-Dashboard-v3.0.0-Stored-XSS-via-Failed-Login-Username-Field

## Other vulnerabilities in tugcantopaloglu openclaw-dashboard

- [CVE-2026-66421](https://insights.sbomify.com/CVE-2026-66421/): OpenClaw Dashboard Stored XSS via lastMessage Session Field (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-66418 and fix it if it is affected.

What it is: CVE-2026-66418 is a critical cross-site scripting vulnerability in tugcantopaloglu openclaw-dashboard, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-66418 exists.

Affected product: tugcantopaloglu openclaw-dashboard. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-66418/ (Markdown: https://insights.sbomify.com/CVE-2026-66418/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-66418
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-66418
- OSV: https://osv.dev/vulnerability/CVE-2026-66418

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-66418/
Summaries are generated and may contain mistakes; the official description above is the record.