CVE-2026-100409 OpenNext Cloudflare - Authorization Bypass

OpenNext Cloudflare 0.3.0 to 1.20.2 contains an authorization bypass caused by inconsistent processing of encoded pathnames between middleware and cache lookup, letting unauthenticated attackers access cached protected content, exploit requires enabled cache interception and matching cached protected routes.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
15 October 2026
Updated
16 October 2026
Weakness
CWE-177

Vendor fix

Update to version 1.20.2 or later.

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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