AI Sec Watch: A Security Intelligence Platform for AI Systems

Luu, T.J.

HighVulnerability

CVE-2026-105238: A flaw has been found in ChatGPTNextWeb NextChat up to 2.16.1. This vulnerability affects the function proxyHandler of…

Source: NVD(opens in a new tab)
Identifier: CVE-2026-105238
Published: October 5, 2026
Record updated: October 9, 2026

Summary

A flaw in ChatGPTNextWeb NextChat up to version 2.16.1 affects the proxyHandler function in app/api/proxy.ts, within the Proxy Fallback Handler component. Manipulating the x-base-url argument causes server-side request forgery, and the attack can be launched remotely. A public exploit has been published, and a pull request to fix the issue is awaiting acceptance.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 7.3(high)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector: network
Attack complexity: low
Privileges required: none
User interaction: none
EPSS: Not scored. FIRST has not published an EPSS score for this CVE yet.
Disclosure date: October 5, 2026

Weaknesses and techniques

Weakness (CWE): CWE-918
Attack pattern (CAPEC): CAPEC-664
AI threat technique (MITRE ATLAS): AML.T0010

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: API
Impact: Confidentiality,
Integrity
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-105238

First tracked: October 5, 2026 at 08:07 AM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 85% (self-assessed)

Summary

Mitigation

Related items

Summary

Mitigation

Related items