Improper privilege management in Deno - CVE-2023-33966
Published: May 30, 2023 / Updated: April 23, 2026
Vulnerability identifier: #VU127030
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-33966
CWE-ID: CWE-269
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass network access restrictions.
The vulnerability exists due to improper privilege management in built-in "node:http" and "node:https" modules when making outbound HTTP requests. A remote attacker can cause the application to use these built-in modules to bypass network access restrictions.
Dependencies relying on these built-in modules are also affected. Deno Deploy users are unaffected.
Affected software
Deno
How to mitigate CVE-2023-33966
Install security update from vendor's website.
Deno - update to 1.34.1