---
id: GHSA-26w7-cxv4-gfx2
title: 'Astro: Remote code execution through AVIF image optimization'
summary: 'Astro: Remote code execution through AVIF image optimization'
severity: critical
cvss: 9.8
cwe:
  - CWE-125
  - CWE-787
vendor: astro
product: astro
ecosystem: npm
affected:
  - astro < 7.2.8
patched:
  - astro 7.2.8
published: '2026-09-08'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:26:18Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-26w7-cxv4-gfx2'
references:
  - url: >-
      https://github.com/strukturag/libheif/security/advisories/GHSA-g89c-p67h-r497
  - url: 'https://github.com/withastro/astro/security/advisories/GHSA-26w7-cxv4-gfx2'
  - url: >-
      https://github.com/withastro/astro/commit/ecb4082131490b4fe9a56aa44fda84b54ef8967b
  - url: 'https://github.com/withastro/astro/releases/tag/astro@7.2.8'
  - url: 'https://github.com/advisories/GHSA-26w7-cxv4-gfx2'
tags:
  - ghsa
  - npm
ingestedAt: '2026-09-08T22:12:30.968Z'
---

## Overview

A vulnerability in `libheif`, used by the default Sharp image service in Astro, can lead to remote code execution when a malicious AVIF image is optimized.

Projects are affected when an attacker can cause Astro to process an untrusted AVIF image.

The fix was released in Astro 7.2.8, which requires Sharp 0.35.4.

## Affected packages

- `astro < 7.2.8`

## Remediation

Upgrade to a patched release:

- `astro 7.2.8`