[UPDATE] [medium] Vercel Next.js: Multiple vulnerabilities allow denial of service

mediumCVE-2025-59471 CVE-2025-59472 CVE-2026-23864

An attacker can exploit multiple vulnerabilities in Vercel Next.js to conduct a denial of service attack.

CSIRTS triage

vendor: Vercel product: Next.js Denial of service

What: An attacker can exploit multiple vulnerabilities in Vercel Next.js to conduct a denial of service attack.
Who is affected: Deployments of Vercel Next.js are affected.
Urgency: Remediation is medium urgency due to the potential for denial of service.
Action: Update to the latest version of Vercel Next.js.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Next.js

Get an email when a new Next.js advisory drops — max one per day, one-click unsubscribe.

Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-02
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0219

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2025-594710.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.
Low exploitation riskCVE-2025-594720.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all EPSS-scored CVEs.
Moderate exploitation riskCVE-2026-238642.4% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 83% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-59471	coverage & exploitation status	NVD · CVE.org
CVE-2025-59472	coverage & exploitation status	NVD · CVE.org
CVE-2026-23864	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownMultiple vulnerabilities in IBM products (July 17, 2026)cert-fr-avis

Recent advisories for Vercel Next.js

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[NEW] [high] Vercel Next.js: Multiple Vulnerabilitiescert-bund · 2026-08-13
high[UPDATE] [high] Vercel Next.js: Multiple vulnerabilitiescert-bund · 2026-08-13
medium[UPDATE] [medium] Vercel Next.js: Multiple vulnerabilitiescert-bund · 2026-07-02