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TI-2026-46210 Aliases CVE-2026-64649GHSA-89xv-2m56-2m9x

Next.js: Server-Side Request Forgery in Server Actions on Custom Servers

Priority LOW 36CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · Low · None
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

Next.js is a React framework for building full-stack web applications. In versions 14.1.1 through 15.5.20 and 16.0.0 through 16.2.10, when a Server Action forwards or redirects a request, an attacker can cause the server to send that outbound request to a malicious host (Server-Side Request Forgery). This requires the attacker's request to control Host-associated headers. In some configurations, it's also possible to obtain internal values that weaken middleware/proxy authorization. Applications that use Server Actions are affected when the incoming host header is not fixed to a trusted value. This typically occurs on custom servers, or on deployments not behind a proxy that pins the host. Managed hosting pins the host upstream and is not affected; next start and standalone output do the same from version 14.2 onward. This issue has been fixed in versions 15.5.21 and 16.2.11.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00459 40th percentileScored 2026-11-07
Fix Partial next.js (vercel): 15.5.21next (npm): 15.5.21, 16.2.11Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
vercelnext.js14.1.1 to before 15.5.21; >= 16.0.0 < 16.2.1115.5.21Patch availableCNA
—next (npm)14.1.1 to before 15.5.2115.5.21Patch availableGHSA-89xv-2m56-2m9x
—next (npm)16.0.0 to before 16.2.1116.2.11Patch availableGHSA-89xv-2m56-2m9x
  • next.js Vendorvercel Affected 14.1.1 to before 15.5.21; >= 16.0.0 < 16.2.11 Fixed in 15.5.21 Patch available CNA
  • next (npm) Vendor— Affected 14.1.1 to before 15.5.21 Fixed in 15.5.21 Patch available GHSA-89xv-2m56-2m9x
  • next (npm) Vendor— Affected 16.0.0 to before 16.2.11 Fixed in 16.2.11 Patch available GHSA-89xv-2m56-2m9x

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*14.1.1 to before 15.5.21; 16.0.0 to before 16.2.11Vulnerablevercel
  • cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* Versions 14.1.1 to before 15.5.21; 16.0.0 to before 16.2.11 Vulnerable ·vercel

Remediation

  • Fix · CNA next.js (vercel) Fixed in 15.5.21
  • Fix · GHSA-89xv-2m56-2m9x next (npm) Fixed in 15.5.21 Advisory →
  • Fix · GHSA-89xv-2m56-2m9x next (npm) Fixed in 16.2.11 Advisory →

Red Hat 1 advisory

  • RHSA-2026:54435 Released 2026-08-12 · Red Hat rating Important
    Streams for Apache Kafka 3.2.1 release and security update
    • Streams for Apache Kafka 3.2.1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet
Streams for Apache Kafka 3.2.1Fixed RHSA-2026:54435
Not affected: 6 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Trusted Artifact Signer
  • streams for Apache Kafka 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-64649
  2. 2026-10-03 Alias added: GHSA-89xv-2m56-2m9x
  3. 2026-11-03 Affected versions changed · Red Hat

References

Patch 2

Advisory 1

Other 3

  • TI-2025-34861 Deserialization of untrusted data in Meta react-server-dom-webpack KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-21309 Authorization Bypass in Next.js Middleware CVSS 3.1CRITICAL 9.1
  • TI-2025-34863 Deserialization of untrusted data in Meta react-server-dom-webpack CVSS 3.1HIGH 7.5
  • TI-2024-31371 Cache Poisoning in next.js CVSS 3.1HIGH 7.5
  • TI-2023-24914 Next.js before 13.4.20-canary.13 lacks a cache-control header and thus empty prefetch… CVSS 3.1HIGH 7.5
  • TI-2026-32490 Next.js: Server-side request forgery in applications using WebSocket upgrades CVSS 3.1HIGH 8.6
See all 62 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences