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CVE-2023-26103

nvd nist
Published: Feb 25, 2023Modified: Jun 17, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD

Description

Versions of the package deno before 1.31.0 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the upgradeWebSocket function, which contains regexes in the form of /s*,s*/, used for splitting the Connection/Upgrade header. A specially crafted Connection/Upgrade header can be used to significantly slow down a web socket server.

Affected (1)

Products: Deno: Deno
Deno
1 product
Deno
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Deno
Before 1.31.0

Related CWEs

CWE-1333
Inefficient Regular Expression Complexity
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.

References (10)

Source: report@snyk.io
Broken Link
Source: report@snyk.io
Patch
Source: report@snyk.io
Patch
Source: report@snyk.io
Release Notes
Source: report@snyk.io
ExploitTechnical DescriptionThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitTechnical DescriptionThird Party Advisory

Timeline

No history available yet.