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Critical, CVSS 9.8amended

Astro: Remote code execution through AVIF image optimization

GHSA-26w7-cxv4-gfx2

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (astro 7.2.8), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • npm astro

    Affected
    < 7.2.8
    Fixed in
    7.2.8

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

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.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-26w7-cxv4-gfx2

  2. Revision 2 · amended ·

    Amended from osv record GHSA-26w7-cxv4-gfx2

  3. Revision 1 · created ·

    Published from ghsa record GHSA-26w7-cxv4-gfx2

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-26w7-cxv4-gfx2

Advisory: Astro: Remote code execution through AVIF image optimization
IDs: GHSA-26w7-cxv4-gfx2
Record: https://patchnext.com/advisories/ghsa-26w7-cxv4-gfx2 (revision 3, source checked 26 Oct 2026, 13:02 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: astro 7.2.8. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm astro: affected < 7.2.8; fixed in 7.2.8

## Suggested inspection (read-only)
- `npm ls astro --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on astro.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-26w7-cxv4-gfx2 (GitHub-reviewed advisory GHSA-26w7-cxv4-gfx2 lists affected ranges: npm astro >=0 <7.2.8)
- Verified: https://osv.dev/vulnerability/GHSA-26w7-cxv4-gfx2 (OSV record GHSA-26w7-cxv4-gfx2 lists affected ranges: npm astro >=0 <7.2.8 (fixed))

Commands are suggestions: review each one before running it.

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