HIGH 8.7 NVD
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's
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.
References
- 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-disclos
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-08-30 via NVD.
vulnfeed aggregates 11475 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.