Next.js: Remote Code Execution in next/og ImageResponse

Why it is Amber

• CVSS 9.5 critical
• Remotely exploitable without logging in
• On your watchlist: npm

Affected packages

References

• https://github.com/advisories/GHSA-vcvr-r3jv-pc5j
• https://github.com/vercel/next.js/security/advisories/GHSA-vcvr-r3jv-pc5j
• https://github.com/vercel/satori/security/advisories/GHSA-wx4j-mvgx-mqwp
• https://github.com/vercel/next.js/commit/868fad38690d72088868f299fa2bef339b26838e
• https://github.com/vercel/next.js/releases/tag/v16.3.6
• https://github.com/advisories/GHSA-vcvr-r3jv-pc5j

Original description

## Impact The Node.js `ImageResponse` implementation from `next/og` is affected by an upstream vulnerability. This can lead to remote code execution. Affected applications pass attacker-controlled values into SVG content, attributes, or styles during image generation: ```tsx import { ImageResponse } from 'next/og' export async function GET(request: Request) { const value = new URL(request.url).searchParams.get('value') ?? '' return new ImageResponse( <svg width="1200" height="630"> <title>{value}</title> </svg> ) } ``` Applications using the Edge `ImageResponse` implementation, or applications that do not pass attacker-controlled values into SVG content, attributes, or styles, are not affected. ## Workaround If upgrading is not immediately possible, do not pass attacker-controlled values into SVG content, attributes, or styles rendered by the Node.js `ImageResponse` implementation from `next/og`.