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Vulnerability details: VCID-g8w6-qujv-dkdj
Vulnerability ID VCID-g8w6-qujv-dkdj
Aliases CVE-2026-44578
GHSA-c4j6-fc7j-m34r
Summary Next.js vulnerable to server-side request forgery in applications using WebSocket upgrades
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-918 Server-Side Request Forgery (SSRF)
System Score Found at
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-c4j6-fc7j-m34r
cvssv3.1 8.6 https://github.com/vercel/next.js
generic_textual HIGH https://github.com/vercel/next.js
cvssv3.1 8.6 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 8.6 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 8.6 https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r
cvssv3.1_qr HIGH https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r
generic_textual HIGH https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r
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-c4j6-fc7j-m34r https://github.com/advisories/GHSA-c4j6-fc7j-m34r
GHSA-c4j6-fc7j-m34r https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:C/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:C/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:C/C:H/I:N/A:N Found at https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34r
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
2026-05-12T18:39:03.316499+00:00 GHSA Importer Import https://github.com/advisories/GHSA-c4j6-fc7j-m34r 38.6.0