ChatGPTNextWeb NextChat API Endpoint Next.js cross-domain policy
Published May 2, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.22%
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.
Affected products
-
- Version 2.16.0StatusaffectedConstraints-
- Version 2.16.1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ChatGPTNextWeb | NextChat | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS: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
1 other source (NVD) ▾
CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
1 other source (NVD) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR
1 other source (NVD) ▾
AV:N/AC:L/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed May 4, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.22% (0.00225) | 11.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.16% (0.00158) | 5.32th | v5 (v2026.06.15) |
| May 3, 2026 | 0.02% (0.00016) | 3.44th | v4 (v2025.03.14) |
References (5)
- https://github.com/ChatGPTNextWeb/NextChat/ product
- https://github.com/ChatGPTNextWeb/NextChat/issues/6756 exploitissue-tracking
- https://vuldb.com/submit/806833 third-party-advisory
- https://vuldb.com/vuln/360755 vdb-entry
- https://vuldb.com/vuln/360755/cti signaturepermissions-required
| Link | Providers | Tags |
|---|---|---|
| https://github.com/ChatGPTNextWeb/NextChat/ | product | |
| https://github.com/ChatGPTNextWeb/NextChat/issues/6756 | exploitissue-tracking | |
| https://vuldb.com/submit/806833 | third-party-advisory | |
| https://vuldb.com/vuln/360755 | vdb-entry | |
| https://vuldb.com/vuln/360755/cti | signaturepermissions-required |
Change history (0)
No recorded changes yet.