CVE-2026-82639: NextChat 2.15.8 through 2.16.1 OpenAI API Key Disclosure
ChatGPTNextWeb · NextChat
Affected: ChatGPTNextWeb NextChat · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 44% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- ChatGPTNextWeb · NextChatfrom 2.15.8 up to and including 2.16.1
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- ChatGPTNextWeb
- Published
- August 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-82639 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.