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Case File

CVE-2023-26103

MEDIUM · CVSS 5.3 EPSS 1.23% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2023-02-25 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗ github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2023-26103
Severity
MEDIUM
CVSS
5.3
EPSS
1.23%

Original 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.