[UPDATE] [medium] Vercel Next.js: Multiple vulnerabilities
A remote, anonymous attacker can exploit multiple vulnerabilities in Vercel Next.js to carry out a denial of service attack or bypass security measures.
CSIRTS triage
- What
- Multiple vulnerabilities can be exploited by a remote attacker to carry out denial of service attacks or bypass security measures.
- Who is affected
- Deployments of Vercel Next.js are affected by these vulnerabilities.
- Urgency
- Remediation is medium urgency due to the potential impact of the vulnerabilities.
- Action
- Update to the latest version of Vercel Next.js to address these issues.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0748
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-2026-279790.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all scored CVEs.
- Low exploitation riskCVE-2026-279800.68% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 48% of all scored CVEs.
- Low exploitation riskCVE-2026-290570.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all scored CVEs.
- Low exploitation riskCVE-2026-279770.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.
- Low exploitation riskCVE-2026-279780.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-27979 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-27980 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-29057 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-27977 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-27978 | coverage & exploitation status | NVD · CVE.org |
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[UPDATE] [high] Vercel Next.js: Multiple vulnerabilitiescert-bund · 2026-07-10
- medium[UPDATE] [medium] Vercel Next.js: Multiple vulnerabilities allow denial of servicecert-bund · 2026-07-02
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