CVE-2026-105238: Server-Side Request Forgery in ChatGPTNextWeb NextChat
Description
CVE-2026-105238 is a server-side request forgery (SSRF) vulnerability in ChatGPTNextWeb NextChat versions 2.16.0 and 2.16.1. The flaw exists in the proxyHandler function of the app/api/proxy.ts file, specifically in the Proxy Fallback Handler component. An attacker can remotely manipulate the x-base-url argument to induce SSRF. An exploit has been published, and a fix is pending acceptance in a pull request.
CVSS v4.0
Score 6.9medium
Affected software
ChatGPTNextWeb
NextChat
pkg:github/chatgptnextweb/NextChatcpe:2.3:a:nextchat:nextchat:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in ChatGPTNextWeb NextChat up to version 2.16.1 allows remote attackers to perform server-side request forgery by manipulating the x-base-url argument in the proxyHandler function of the Proxy Fallback Handler component (app/api/proxy.ts). The flaw enables attackers to make unauthorized requests from the server. Although an exploit is publicly available, the fix is not yet merged and awaiting acceptance.
Potential Impact
The SSRF vulnerability allows remote attackers to cause the server to make unintended requests, potentially leading to information disclosure or interaction with internal systems. The CVSS 4.0 score is 6.9 (medium severity), indicating a significant but not critical risk. No confirmed in-the-wild exploitation is reported yet.
Mitigation Recommendations
A pull request containing the fix is pending acceptance. Until the fix is merged and deployed, users should consider restricting access to the vulnerable proxyHandler function or applying network-level controls to limit outbound requests from the server. Monitor the vendor's repository or advisory for the official patch and apply it promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-10-04T16:15:43.837Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac34bd62cdf04f656ce0c4e
Added to database: 10/05/2026, 07:03:50 UTC
Last enriched: 10/05/2026, 07:18:24 UTC
Last updated: 10/05/2026, 07:18:58 UTC
Views: 4
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