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Vulnerability details: VCID-b9ar-1t6z-63dy
Vulnerability ID VCID-b9ar-1t6z-63dy
Aliases CVE-2026-44573
GHSA-36qx-fr4f-26g5
Summary Next.js has a Middleware / Proxy bypass in Pages Router applications using i18n
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-863 Incorrect Authorization
System Score Found at
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-36qx-fr4f-26g5
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-36qx-fr4f-26g5
cvssv3.1_qr HIGH https://github.com/vercel/next.js/security/advisories/GHSA-36qx-fr4f-26g5
generic_textual HIGH https://github.com/vercel/next.js/security/advisories/GHSA-36qx-fr4f-26g5
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-36qx-fr4f-26g5 https://github.com/advisories/GHSA-36qx-fr4f-26g5
GHSA-36qx-fr4f-26g5 https://github.com/vercel/next.js/security/advisories/GHSA-36qx-fr4f-26g5
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-36qx-fr4f-26g5
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
2026-05-12T18:39:03.149241+00:00 GHSA Importer Import https://github.com/advisories/GHSA-36qx-fr4f-26g5 38.6.0