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Vulnerability · Published Oct 5, 2026 · Assigned by VulDB

CVE-2026-105238ChatGPTNextWeb NextChat Proxy Fallback proxy.ts proxyHandler server-side request forgery

High 7.3

In plain English

A high-severity server-side request forgery in NextChat from ChatGPTNextWeb. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.4%top 64.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A flaw has been found in ChatGPTNextWeb NextChat up to 2.16.1. This vulnerability affects the function proxyHandler of the file app/api/proxy.ts of the component Proxy Fallback Handler. This manipulation of the argument x-base-url causes server-side request forgery. It is possible to initiate the attack remotely. The exploit has been published and may be used. The pull request to fix this issue awaits acceptance.

Affected products (as reported)

VendorProductVersions
ChatGPTNextWeb NextChat 2.16.02.16.1

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C

References