CVE-2026-10216: Droidclaw Auth Bypass Vulnerability

CVE-2026-10216 Overview

CVE-2026-10216 affects unitedbyai droidclaw versions up to 0.5.3. The vulnerability resides in an unknown function within server/src/routes/pairing.ts, which forms part of the claim Endpoint component. The flaw allows improper restriction of excessive authentication attempts [CWE-307], enabling remote attackers to brute-force authentication without rate limiting.

The exploit is publicly disclosed, though the attack complexity is high and exploitability is described as difficult. The project maintainers were notified through an issue report but have not yet responded.

Critical Impact

Remote attackers can attempt unlimited authentication attempts against the claim Endpoint, increasing the likelihood of credential compromise through brute-force or credential-stuffing techniques.

Affected Products

• unitedbyai droidclaw up to version 0.5.3
• Component: claim Endpoint (server/src/routes/pairing.ts)
• Deployments exposing the pairing route over a network

Discovery Timeline

• 2026-06-01 - CVE-2026-10216 published to the National Vulnerability Database (NVD)
• 2026-06-01 - Last updated in NVD database

Technical Details for CVE-2026-10216

Vulnerability Analysis

The vulnerability is classified under [CWE-307] Improper Restriction of Excessive Authentication Attempts. The affected route server/src/routes/pairing.ts handles claim or pairing requests but does not enforce throttling, lockout, or rate-limit controls on failed attempts.

Without these controls, an attacker can iterate through credential or token combinations programmatically. The attack is launched remotely over the network. Although the disclosure characterizes exploitability as difficult and complexity as high, the public exploit code lowers the barrier to opportunistic abuse.

Root Cause

The root cause is the absence of authentication attempt restriction logic in the pairing route. Web application endpoints handling claim or device-pairing operations must enforce counters, exponential backoff, CAPTCHAs, or temporary account lockouts. The droidclaw implementation lacks these mechanisms, leaving the endpoint open to automated guessing.

Attack Vector

An attacker reaches the vulnerable endpoint over the network without authentication or user interaction. The attacker issues repeated authentication or pairing requests against server/src/routes/pairing.ts, observing responses to determine valid credentials or tokens. The Exploit Prediction Scoring System (EPSS) places this issue at the 17.837 percentile, reflecting limited but non-zero exploitation likelihood.

The vulnerability mechanism is described in prose only. No verified proof-of-concept code is included here. Technical details and the gist referenced in the disclosure are available through the GitHub Issue #14: DroidClaw and the VulDB CVE-2026-10216 Entry.

Detection Methods for CVE-2026-10216

Indicators of Compromise

• High volumes of HTTP requests to the /pairing route from a single source IP or distributed IP ranges within short time windows
• Repeated authentication failures logged by the droidclaw server with identical or sequential payload patterns
• Anomalous spikes in claim Endpoint traffic outside normal user pairing workflows

Detection Strategies

• Instrument the server/src/routes/pairing.ts route with structured logging that records request source, timestamp, and authentication result
• Deploy web application firewall (WAF) rules that count failed authentication attempts per source and alert on threshold breaches
• Correlate authentication failure logs with downstream successful logins to identify brute-force followed by compromise

Monitoring Recommendations

• Forward droidclaw application logs to a centralized SIEM for cross-source correlation
• Configure alerting on burst patterns against the pairing endpoint, including low-and-slow distributed attempts
• Track unique source IPs and user agents interacting with the claim Endpoint over rolling windows

How to Mitigate CVE-2026-10216

Immediate Actions Required

• Restrict network exposure of the droidclaw pairing endpoint to trusted networks or VPN segments until a fix is available
• Place the application behind a reverse proxy or WAF that enforces request rate limiting on /pairing
• Monitor the GitHub Project: DroidClaw repository for upstream remediation activity

Patch Information

No vendor patch is currently available. The project was notified through GitHub Issue #14: DroidClaw but has not responded at the time of disclosure. Operators running droidclaw 0.5.3 or earlier should apply compensating controls until a patched release is published.

Workarounds

• Implement reverse-proxy rate limiting (for example, nginx limit_req_zone or HAProxy stick-tables) targeting the pairing route
• Add IP-based and account-based lockout policies at the proxy or API gateway layer after a defined number of failed attempts
• Require additional verification factors such as CAPTCHA or one-time codes on the claim Endpoint where feasible
• Reduce session and token lifetimes for credentials issued via the pairing flow to limit brute-force window value

# Configuration example: nginx rate limiting for the pairing route
http {
    limit_req_zone $binary_remote_addr zone=pairing_zone:10m rate=5r/m;

    server {
        location /pairing {
            limit_req zone=pairing_zone burst=3 nodelay;
            limit_req_status 429;
            proxy_pass http://droidclaw_backend;
        }
    }
}