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Description

A flaw has been found in ChatGPTNextWeb NextChat up to 2.16.1. This impacts an unknown function of the file Next.js of the component API Endpoint. Executing a manipulation can lead to permissive cross-domain policy with untrusted domains. The attack may be launched remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

PUBLISHED Reserved 2026-05-01 | Published 2026-05-02 | Updated 2026-05-04 | Assigner VulDB




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
MEDIUM: 4.3CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
5.0AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR

Problem types

Permissive Cross-domain Policy with Untrusted Domains

Origin Validation Error

Product status

2.16.0
affected

2.16.1
affected

Timeline

2026-05-01:Advisory disclosed
2026-05-01:VulDB entry created
2026-05-01:VulDB entry last update

Credits

Yu_Bao (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/360755 (VDB-360755 | ChatGPTNextWeb NextChat API Endpoint Next.js cross-domain policy) vdb-entry

vuldb.com/vuln/360755/cti (VDB-360755 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/806833 (Submit #806833 | ChatGPTNextWeb NextChat 2.16.1 Permissive CORS Wildcard Policy) third-party-advisory

github.com/ChatGPTNextWeb/NextChat/issues/6756 exploit issue-tracking

github.com/ChatGPTNextWeb/NextChat/ product

cve.org (CVE-2026-7643)

nvd.nist.gov (CVE-2026-7643)

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