Critical

Critical Next.js ImageResponse Flaw Can Lead to Server Code Execution via Crafted SVG Input

The Hacker News

September 23, 2026 at 7:04 AM

Overview

A vulnerability in Next.js, a popular framework for building web applications, could allow attackers to execute arbitrary code on servers through its ImageResponse feature. This issue arises when user-controlled values, such as text from the request URL, are incorporated into generated images. Vercel, the company behind Next.js, announced the fix for this flaw on September 22, 2023, in a new software version. This vulnerability is particularly concerning for developers who might inadvertently expose their applications to risks by improperly handling user input. It’s crucial for users of Next.js to update to the latest version to mitigate potential exploitation.

Key Takeaways

Affected Systems: Next.js versions prior to the fix on September 22, 2023
Action Required: Upgrade to Next.
Timeline: Disclosed on September 22, 2023

Original Article Summary

A new security vulnerability in Next.js could allow attackers to run code on a server via ImageResponse, the feature that generates Open Graph and other social preview images, Vercel said. The risk applies when an app puts values an attacker controls, such as text read from the request URL, into the image. Vercel, which develops Next.js, fixed the flaw on September 22 in version

Impact

Next.js versions prior to the fix on September 22, 2023

Exploitation Status

The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.

Timeline

Disclosed on September 22, 2023

Remediation

Upgrade to Next.js version released on September 22, 2023.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Vulnerability, Update, Critical.

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