CVE-2023-7080

Arbitrary remote code execution within wrangler dev Workers sandbox

The V8 inspector intentionally allows arbitrary code execution within the Workers sandbox for debugging. wrangler dev would previously start an inspector server listening on all network interfaces. This would allow an attacker on the local network to connect to the inspector and run arbitrary code. Additionally, the inspector server did not validate Origin/Host headers, granting an attacker that can trick any user on the local network into opening a malicious website the ability to run code. If wrangler dev --remote was being used, an attacker could access production resources if they were bound to the worker.

The application assigns, modifies, tracks, or checks privileges incorrectly, allowing a user to gain elevated access. Typical impact: privilege escalation beyond the intended level.

CVE-2023-7080 has a CVSS score of 9.3 (Critical). The vector is reachable from an adjacent network, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (3.19.0, 2.20.2); upgrading removes the vulnerable code path.

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This issue was fixed in [email protected] and [email protected]. Whilst wrangler dev's inspector server listens on local interfaces by default as of [email protected], an SSRF vulnerability in miniflare allowed access from the local network until [email protected]. [email protected] and [email protected] introduced validation for the Origin/Host headers.

1. What is CVE-2023-7080? CVE-2023-7080 is a critical-severity improper privilege management vulnerability in wrangler (npm), affecting versions >= 3.0.0, < 3.19.0. It is fixed in 3.19.0, 2.20.2. The application assigns, modifies, tracks, or checks privileges incorrectly, allowing a user to gain elevated access.
2. How severe is CVE-2023-7080? CVE-2023-7080 has a CVSS score of 9.3 (Critical). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of wrangler are affected by CVE-2023-7080? wrangler (npm) versions >= 3.0.0, < 3.19.0 is affected.
4. Is there a fix for CVE-2023-7080? Yes. CVE-2023-7080 is fixed in 3.19.0, 2.20.2. Upgrade to this version or later.
5. Is CVE-2023-7080 exploitable, and should I be worried? Whether CVE-2023-7080 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2023-7080 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2023-7080?
   • Upgrade wrangler to 3.19.0 or later
   • Upgrade wrangler to 2.20.2 or later

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