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Vulnerability details: VCID-wq4q-a494-cbd3
Vulnerability ID VCID-wq4q-a494-cbd3
Aliases CVE-2026-44575
GHSA-267c-6grr-h53f
Summary Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-288 Authentication Bypass Using an Alternate Path or Channel
System Score Found at
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-267c-6grr-h53f
cvssv3.1 7.5 https://github.com/vercel/next.js
generic_textual HIGH https://github.com/vercel/next.js
cvssv3.1 7.5 https://github.com/vercel/next.js/releases/tag/v15.5.16
generic_textual HIGH https://github.com/vercel/next.js/releases/tag/v15.5.16
cvssv3.1 7.5 https://github.com/vercel/next.js/releases/tag/v16.2.5
generic_textual HIGH https://github.com/vercel/next.js/releases/tag/v16.2.5
cvssv3.1 7.5 https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f
cvssv3.1_qr HIGH https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f
generic_textual HIGH https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f
Reference id Reference type URL
https://github.com/vercel/next.js
https://github.com/vercel/next.js/releases/tag/v15.5.16
https://github.com/vercel/next.js/releases/tag/v16.2.5
GHSA-267c-6grr-h53f https://github.com/advisories/GHSA-267c-6grr-h53f
GHSA-267c-6grr-h53f https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/vercel/next.js
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/vercel/next.js/releases/tag/v15.5.16
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/vercel/next.js/releases/tag/v16.2.5
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

No EPSS data available for this vulnerability.

Date Actor Action Source VulnerableCode Version
2026-05-12T18:39:03.240117+00:00 GHSA Importer Import https://github.com/advisories/GHSA-267c-6grr-h53f 38.6.0