CVE-2026-105238 ChatGPTNextWeb NextChat - Server-Side Request Forgery

ChatGPTNextWeb NextChat <= 2.16.1 contains a server-side request forgery caused by manipulation of the "x-base-url" argument in app/api/proxy.ts Proxy Fallback Handler, letting remote attackers initiate SSRF, exploit requires no special privileges.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.39% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Server-Side Request Forgery
Impact
Server Side Request Forgery
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
5 October 2026
Updated
15 October 2026
Weakness
CWE-918

Vendor fix

Update to a fixed version once the pull request is accepted or apply the patch when available.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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