CVE-2026-45109: falha de alta gravidade em vercel next.js
Next.js: Middleware / Proxy bypass in App Router applications via segment-prefetch routes
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Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.5epss 0.9%
Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Produtos afetados
vercel · next.jsCVEs relacionadas — vercel next.js
No mesmo produto, das mais perigosas para as menos.
CVE-2025-29927CRITICALAuthorization Bypass in Next.js MiddlewareEPSS 99.2%CVE-2024-46982HIGHCache Poisoning in next.jsEPSS 59.2%CVE-2021-43803HIGHUnexpected server crash in Next.jsEPSS 47.3%CVE-2026-44578HIGHNext.js: Server-side request forgery in applications using WebSocket upgradesEPSS 35.5%CVE-2024-34351HIGHNext.js Server-Side Request Forgery in Server ActionsEPSS 5.5%CVE-2024-51479HIGHAuthorization bypass in Next.jsEPSS 4.0%
Referências
https://access.redhat.com/errata/RHSA-2026:34608https://access.redhat.com/errata/RHSA-2026:37272https://access.redhat.com/errata/RHSA-2026:40974https://access.redhat.com/errata/RHSA-2026:54435https://access.redhat.com/security/cve/CVE-2026-45109https://bugzilla.redhat.com/show_bug.cgi?id=2477190https://github.com/vercel/next.js/releases/tag/v15.5.18https://github.com/vercel/next.js/releases/tag/v16.2.6https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53fhttps://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45109.jsonhttps://vercel.com/changelog/next-js-may-2026-security-release