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Vulnerability record · CVE-2023-7080 · published 29 December 2023

CVE-2023-7080: Cloudflare wrangler improper privilege management vulnerability

Cloudflare · Wrangler

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. 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 https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-fwvg-2739-22v7  (CVE-2023-7078) allowed access from the local network until [email protected]. [email protected] and [email protected] introduced validation for the Origin/Host headers.

8.0 CVSS 3.1 High EPSS 0.63% · top 51.9% CWE-269 · Improper privilege management
8.0CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

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. 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 https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-fwvg-2739-22v7  (CVE-2023-7078) allowed access from the local network until [email protected]. [email protected] and [email protected] introduced validation for the Origin/Host headers.

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/cloudflare/workers-sdk/issues/4430 Issue TrackingPatch
https://github.com/cloudflare/workers-sdk/pull/4437 Patch
https://github.com/cloudflare/workers-sdk/pull/4535 Patch
https://github.com/cloudflare/workers-sdk/pull/4550 Patch
https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-f8mp-x433-5wpf MitigationPatchThird Party Advisory
https://github.com/cloudflare/workers-sdk/issues/4430 Issue TrackingPatch
https://github.com/cloudflare/workers-sdk/pull/4437 Patch
https://github.com/cloudflare/workers-sdk/pull/4535 Patch
https://github.com/cloudflare/workers-sdk/pull/4550 Patch
https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-f8mp-x433-5wpf MitigationPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-7080), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.