CVE-2026-64646Medium▾ SunlitNext.js: Unbounded Server Action payload in Edge runtime
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 28.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.5%
Requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime
If you cannot upgrade, ensure your hosting provider limits the request's body size. 5 MiB should be allowed at max by your hosting provider.
next >= 13.0.0, < 15.5.21next >= 16.0.0, < 16.2.11Upgrade to a patched release:
next 15.5.21next 16.2.11Connected by shared product, vendor, weakness, or advisory.
CVE-2026-64648MediumNext.js: Cache confusion of response bodies for requests with bodies
CVE-2026-64649HighNext.js: Server-Side Request Forgery in Server Actions on custom servers
CVE-2026-64641HighNext.js: Denial of Service in App Router using Server Actions
CVE-2026-64643MediumNext.js: Unauthenticated disclosure of internal Server Function endpoints
CVE-2026-64644MediumNext.js: Denial of Service in the Image Optimization API using SVGs
CVE-2026-64645HighNext.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostname