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Vulnerability record · CVE-2023-33966 · published 31 May 2023

CVE-2023-33966: Deno improper privilege management vulnerability

Deno · Deno

Deno is a runtime for JavaScript and TypeScript. In deno 1.34.0 and deno_runtime 0.114.0, outbound HTTP requests made using the built-in `node:http` or `node:https` modules are incorrectly not checked against the network permission allow list (`--allow-net`). Dependencies relying on these built-in modules are subject to the vulnerability too. Users of Deno versions prior to 1.34.0 are unaffected. Deno Deploy users are unaffected. This problem has been patched in Deno v1.34.1 and deno_runtime 0.114.1 and all users are recommended to update to this version. No workaround is available for this issue.

9.8 CVSS 3.1 Critical EPSS 0.63% · top 52.1% CWE-269 · Improper privilege managementCWE-276 · Incorrect default permissions
9.8CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Deno is a runtime for JavaScript and TypeScript. In deno 1.34.0 and deno_runtime 0.114.0, outbound HTTP requests made using the built-in `node:http` or `node:https` modules are incorrectly not checked against the network permission allow list (`--allow-net`). Dependencies relying on these built-in modules are subject to the vulnerability too. Users of Deno versions prior to 1.34.0 are unaffected. Deno Deploy users are unaffected. This problem has been patched in Deno v1.34.1 and deno_runtime 0.114.1 and all users are recommended to update to this version. No workaround is available for this issue.

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

Affected products

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

References

LinkTags
https://github.com/denoland/deno/releases/tag/v1.34.1 Release Notes
https://github.com/denoland/deno/security/advisories/GHSA-vc52-gwm3-8v2f Vendor Advisory
https://github.com/denoland/deno/releases/tag/v1.34.1 Release Notes
https://github.com/denoland/deno/security/advisories/GHSA-vc52-gwm3-8v2f Vendor 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-2023-33966), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.