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.
Metrics
Affected Vendors & Products
References
History
Mon, 31 Aug 2026 17:30:00 +0000
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| Metrics |
ssvc
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Sun, 30 Aug 2026 17:15:00 +0000
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| First Time appeared |
Chatgptnextweb
Chatgptnextweb nextchat |
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| Vendors & Products |
Chatgptnextweb
Chatgptnextweb nextchat |
Sun, 30 Aug 2026 13:30:00 +0000
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| 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 |
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| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-08-30T13:23:39.106Z
Updated: 2026-08-31T16:51:17.973Z
Reserved: 2026-08-30T13:06:02.366Z
Link: CVE-2026-82639
Updated: 2026-08-31T16:50:36.617Z
Status : Received
Published: 2026-08-30T14:17:03.750
Modified: 2026-08-31T17:17:45.737
Link: CVE-2026-82639
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