CVE-2026-44578Next.js: Server-side request forgery in applications using WebSocket upgrades
Updated under an hour ago ()
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It affects vercel next.js and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Next.js is a React framework for building full-stack web applications. From 13.4.13 to before 15.5.16 and 16.2.5, self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected. This vulnerability is fixed in 15.5.16 and 16.2.5.
- CVSS
- 8.6 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Modified
- Record last updated
- Aug 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
vercel next.js vercel:next.js (from the name) | from 16.0.0, < 16.2.5; from 13.4.13, < 15.5.16 | CNA record |
Red Hat Streams for Apache Kafka 2.9.4 redhat:amq_streams | 2.9 | CISA ADP |
Red Hat Red Hat Trusted Artifact Signer 1.3 redhat:trusted_artifact_signer | from 1783958622 not affected | CISA ADP |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | 10 | CISA ADP |
Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3 redhat:enterprise_linux_ai | 3 | CISA ADP |
vercel next.js vercel:next.js | from 13.4.13 before 15.5.16; from 16.0.0 before 16.2.5 | NVD |
References
- https://github.com/vercel/next.js/security/advisories/GHSA-c4j6-fc7j-m34rx-refsource-confirm, mitigation, vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:34608
- https://access.redhat.com/errata/RHSA-2026:37272
- https://access.redhat.com/errata/RHSA-2026:40974
- https://access.redhat.com/errata/RHSA-2026:54435
- https://access.redhat.com/security/cve/CVE-2026-44578
- https://bugzilla.redhat.com/show_bug.cgi?id=2477187
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44578.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.