{"id":"CVE-2026-100409","revision":"19966e45550142fd91e27fdd02fc9d99","records":[{"revision":"19966e45550142fd91e27fdd02fc9d99","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-100409","aliases":[],"title":"OpenNext Cloudflare: Cache interception can bypass middleware protection for encoded paths","description":"OpenNext Cloudflare is an open Next.js adapter for Cloudflare. From 0.3.0 until 1.20.2, applications that enable enableCacheInterception, rely on middleware for access control, and have a matching cached protected route process encoded pathnames inconsistently between middleware matching and cache lookup. An unauthenticated attacker can use a percent-encoded pathname that does not match authorization middleware but decodes to the cache key of a protected route, causing cached content to be returned without authorization. Malformed encodings can also be partially decoded, allowing cache lookup to continue with a pathname that middleware did not evaluate consistently. This issue is fixed in version 1.20.2.","state":0,"publishedAt":"2026-10-15T16:57:50.999+00:00","modifiedAt":"2026-10-15T17:50:33.255+00:00","affected":[{"ecosystem":"Vendor product","name":"opennextjs-cloudflare","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"opennextjs\",\n                    \"product\": \"opennextjs-cloudflare\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.3.0, < 1.20.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/opennextjs/opennextjs-cloudflare/security/advisories/GHSA-2vc4-c4r6-p6v6","https://github.com/opennextjs/opennextjs-aws/pull/1199","https://github.com/opennextjs/opennextjs-aws/pull/1200","https://github.com/opennextjs/opennextjs-cloudflare/commit/38ea40b669be272ddf09a7df7e70c69d0b57404b","https://github.com/opennextjs/opennextjs-cloudflare/releases/tag/@opennextjs/cloudflare@1.20.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-100409","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-100409","identifiers":["CVE-2026-100409"]},"retained":false,"historicalAffected":[]}],"coverage":[]}