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Vulnerability Database

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Use a repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress so remediation is steady, not reactive.

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349,003

Total vulnerabilities in the database

OpenClaw: Symlink Traversal via IDENTITY.md appendFile in agents.create/update (Incomplete Fix for CVE-2026-32013) — openclaw

UNIX Symbolic Link (Symlink) Following

Summary

The patch for CVE-2026-32013 introduced symlink resolution and workspace boundary enforcement for agents.files.get and agents.files.set. However, two other handlers in the same file (agents.create and agents.update) still use raw fs.appendFile on the IDENTITY.md file without any symlink containment check. An attacker who can place a symlink in the agent workspace can hijack the IDENTITY.md path to append attacker-controlled content to arbitrary files on the system.

Details

In src/gateway/server-methods/agents.ts, the agents.create handler constructs the identity path and appends agent metadata without verifying symlinks:

// agents.create — line 283-291
const identityPath = path.join(workspaceDir, DEFAULT_IDENTITY_FILENAME);
const lines = [
  &quot;&quot;,
  `- Name: ${safeName}`,
  ...(emoji ? [`- Emoji: ${sanitizeIdentityLine(emoji)}`] : []),
  ...(avatar ? [`- Avatar: ${sanitizeIdentityLine(avatar)}`] : []),
  &quot;&quot;,
];
await fs.appendFile(identityPath, lines.join(&quot;\n&quot;), &quot;utf-8&quot;); // ← NO SYMLINK CHECK

The agents.update handler has the same issue at line 348-349:

// agents.update — line 348-349
const identityPath = path.join(workspace, DEFAULT_IDENTITY_FILENAME);
await fs.appendFile(identityPath, `\n- Avatar: ${sanitizeIdentityLine(avatar)}\n`, &quot;utf-8&quot;); // ← NO SYMLINK CHECK

fs.appendFile follows symlinks by default. If the IDENTITY.md file in the workspace is a symlink pointing to a sensitive file (e.g., /etc/crontab, ~/.bashrc, or ~/.ssh/authorized_keys), calling agents.create will append the agent identity metadata to that file.

The ensureAgentWorkspace function (called at line 274 before the append) uses exclusive-create mode (flag: 'wx') for IDENTITY.md. If a symlink already exists at that path, the EEXIST error is silently caught, and the subsequent fs.appendFile follows the symlink.

Attack flow:

1. Attacker plants symlink: workspace/IDENTITY.md → /etc/crontab
2. ensureAgentWorkspace skips creation (EEXIST from symlink)
3. fs.appendFile follows symlink → writes to /etc/crontab
4. Attacker-controlled content (name, emoji, avatar) injected into crontab → RCE

PoC

Prerequisites: Docker and Python 3 installed.

Step 1: Build and start the test environment.

cd llm-enhance/cve-finding/RCE/CVE-2026-32013-identity-appendFile-variant-exp/
docker compose up -d --build
sleep 3

Step 2: Run the exploit.

python3 poc_exploit.py

This script:

Plants a symlink IDENTITY.md → /etc/target-file.txt inside the agent workspace
Calls the agents.create API endpoint via HTTP POST
Verifies that the agent identity metadata was appended to /etc/target-file.txt

Step 3: Run the control experiment.

python3 control-patched_realpath.py

Step 4: Cleanup.

docker compose down

Log of Evidence

Exploit output:

=== CVE-2026-32013 Variant: Symlink Traversal via IDENTITY.md appendFile ===
[*] Planting symlink: IDENTITY.md -&gt; /etc/target-file.txt
[*] Symlink: lrwxrwxrwx 1 root root 20 /workspaces/evil-agent/IDENTITY.md -&gt; /etc/target-file.txt
[*] Original /etc/target-file.txt: ORIGINAL_SENSITIVE_CONTENT

[*] Calling agents.create with name=&#039;evil-agent&#039;...
[*] API response: {&#039;ok&#039;: True, &#039;agentId&#039;: &#039;evil-agent&#039;, &#039;workspace&#039;: &#039;/workspaces/evil-agent&#039;}

[*] /etc/target-file.txt after exploit:
    ORIGINAL_SENSITIVE_CONTENT

- Name: evil-agent
- Emoji: 💀
- Avatar: evil.png

[+] SUCCESS! Symlink traversal confirmed.
[+] fs.appendFile followed IDENTITY.md symlink and wrote to /etc/target-file.txt
[+] Attacker-controlled content injected into arbitrary file.

Control output:

=== CONTROL: Patched agents.create blocks symlink traversal ===
[*] Planting symlink: IDENTITY.md -&gt; /etc/target-file.txt
[*] Original /etc/target-file.txt: ORIGINAL_SENSITIVE_CONTENT

[*] Calling PATCHED agents.create with name=&#039;safe-agent&#039;...
[*] API response: {&#039;ok&#039;: False, &#039;error&#039;: &#039;symlink_traversal_blocked&#039;, &#039;realPath&#039;: &#039;/etc/target-file.txt&#039;}

[*] /etc/target-file.txt after patched call: ORIGINAL_SENSITIVE_CONTENT

[+] CONTROL PASSED: Patched endpoint detected and blocked symlink traversal.
[+] /etc/target-file.txt remains unchanged.

Impact

An attacker who can plant a symlink in the agent workspace directory can use the agents.create or agents.update gateway API to append attacker-controlled content to arbitrary files on the system. If the target file is:

/etc/crontab or user crontab → Remote Code Execution
~/.bashrc or ~/.profile → Persistent code execution on login
~/.ssh/authorized_keys → Unauthorized SSH access
Application configuration files → Service disruption

The attacker-controlled content includes the agent name (arbitrary string), emoji, and avatar fields, which are only lightly sanitized (whitespace normalization via sanitizeIdentityLine).

Affected products

Ecosystem: npm
Package name: openclaw
Affected versions: <= 2026.2.22
Patched versions: None

Occurrences

| Permalink | Description | | :--- | :--- | | https://github.com/openclaw/openclaw/blob/main/src/gateway/server-methods/agents.ts#L283-L291 | agents.create handler uses fs.appendFile on IDENTITY.md without symlink resolution or workspace boundary check. | | https://github.com/openclaw/openclaw/blob/main/src/gateway/server-methods/agents.ts#L348-L349 | agents.update handler uses fs.appendFile on IDENTITY.md without symlink resolution or workspace boundary check. | | https://github.com/openclaw/openclaw/blob/main/src/gateway/server-methods/agents.ts#L274 | ensureAgentWorkspace is called before append, but its exclusive-create (wx) flag silently skips existing symlinks (EEXIST). |

Published: Mar 26, 2026
Updated: Mar 27, 2026
GHSA: GHSA-7xr2-q9vf-x4r5
Severity: High
Exploit:
CISA KEV:

CVSS v3:

Severity: Unknown
Score:
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CWEs:

CWE-61

Affected Software
References

Software	From	Fixed in
openclaw	-	2026.2.22.x

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Frequently Asked Questions

What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.