SEPTEMBER 18, 2026
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Case File

CVE-2026-82639

HIGH · CVSS 7.5 EPSS 0.30% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-30 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

NextChat versions 2.15.8 to 2.16.1 are vulnerable due to improper URL validation in the proxy endpoint, which permits attackers to exploit the x-base-url header. This flaw enables unauthorized access to the server's OpenAI API key, potentially compromising sensitive data and API interactions. Organizations using affected NextChat versions should prioritize patching this vulnerability to safeguard their API credentials and prevent potential data breaches.

Public Exploit Signal

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

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

CVE
CVE-2026-82639
Severity
HIGH
CVSS
7.5
EPSS
0.30%

Original NVD Description

NextChat versions from 2.15.8 through 2.16.1 contain an improper URL validation vulnerability in the proxy endpoint that allows attackers to obtain the server's OpenAI API key. The x-base-url header is validated using substring matching instead of hostname parsing, allowing any URL containing 'api.openai.com' to pass validation and receive the server's credentials in the Authorization header.