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CVE-2023-33966

28
FAUCET Score

CVE-2023-33966 is a critical vulnerability affecting Deno versions 1.34.0 and deno_runtime 0.114.0, where outbound HTTP requests made via built-in node:http or node:https modules bypass the --allow-net network permission. This allows unauthorized network access, impacting confidentiality, integrity, and availability. With a CVSS score of 9.8 (CRITICAL), it is easily exploitable over the network with no user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
1.34.0CPE matchmatch criteria
cpe:2.3:a:deno:deno:1.34.0:*:*:*:*:*:*:*
0.114.0CPE matchmatch criteria
cpe:2.3:a:deno:deno_runtime:0.114.0:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0063 is in the 27th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

rustpatch availablevia ghsa
Product: denoFixed in: 1.34.1
rustpatch availablevia ghsa
Product: deno_runtimeFixed in: 0.115.0
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

rustGHSA-vc52-gwm3-8v2fhigh

Missing "--allow-net" permission check for built-in Node modules

May 31, 2023

References

github.com / denoland/deno/releases/tag/v1.34.1
Release Notes
github.com / denoland/deno/security/advisories/GHSA-vc52-gwm3-8v2f
Vendor Advisory