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.
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References
History
Sun, 30 Aug 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | NextChat 2.15.8 through 2.16.1 OpenAI API Key Disclosure | |
| First Time appeared |
Nextchat
Nextchat nextchat |
|
| Weaknesses | CWE-20 | |
| CPEs | cpe:2.3:a:nextchat:nextchat:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Nextchat
Nextchat nextchat |
|
| References |
| |
| Metrics |
cvssV3_1
|
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-30T13:23:39.106Z
Reserved: 2026-08-30T13:06:02.366Z
Link: CVE-2026-82639
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