high7.5
CVE-2026-82639
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'…
Impact
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 products
| Product | Affected versions |
|---|---|
| NextChat Versions From 2.15.8 | through 2.16.1 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/ChatGPTNextWeb/NextChat
- https://github.com/ChatGPTNextWeb/NextChat/blob/v2.16.1/app/api/proxy.ts
- https://github.com/ChatGPTNextWeb/NextChat/issues/6814
- https://www.vulncheck.com/advisories/nextchat-2.15.8-through-2.16.1-openai-api-key-disclosure
- https://github.com/ChatGPTNextWeb/NextChat/issues/6814