ChatGPTNextWeb NextChat up to 2.16.1 API Endpoint Next.js cross-domain policy

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in ChatGPTNextWeb NextChat up to 2.16.1 and classified as problematic. Affected is an unknown function of the file Next.js of the component API Endpoint. The manipulation leads to cross-domain policy. This vulnerability is referenced as CVE-2026-7643. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability was found in ChatGPTNextWeb NextChat up to 2.16.1. It has been rated as problematic. This issue affects an unknown part of the file Next.js of the component API Endpoint. The manipulation with an unknown input leads to a cross-domain policy vulnerability. Using CWE to declare the problem leads to CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. Impacted is integrity.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-7643. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-26797). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross-domain policy
CWE: CWE-942 / CWE-346 / CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/01/2026 Advisory disclosed
05/01/2026 +0 days VulDB entry created
05/02/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 6756
Status: Not defined

CVE: CVE-2026-7643 (🔒)
GCVE (CVE): GCVE-0-2026-7643
GCVE (VulDB): GCVE-100-360755
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/01/2026 18:39
Updated: 05/02/2026 23:08
Changes: 05/01/2026 18:39 (58), 05/02/2026 23:08 (1)
Complete: 🔍
Submitter: Yu_Bao
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #806833: ChatGPTNextWeb NextChat 2.16.1 Permissive CORS Wildcard Policy (by Yu_Bao)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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