CVE-2026-82639
High · 7.5CVSS
7.5
EPSS
0.5%
Published
Aug 30, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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