Recently, many Adobe Commerce Cloud users started facing deployment failures while pushing code or uploading changes to Cloud environments.
The main reason behind this issue is a new security enhancement introduced by Composer.
Composer now automatically blocks vulnerable versions and insecure dependencies, which directly affects older Adobe Commerce Cloud setups.
Adobe also officially notified merchants and developers to upgrade Composer versions immediately to avoid deployment failures and maintain security compliance.
Why Deployment Is Failing
Composer released a security advisory:
👉 https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2
Due to this update:
- Vulnerable Composer versions are blocked
- Dependency installation may fail
- Adobe Commerce Cloud deployments can stop working
- CI/CD pipelines may break
Even if your Magento code is correct, deployment can still fail because of an outdated Composer version.
Adobe Recommended Composer Versions
Adobe recommends upgrading Composer based on your Adobe Commerce version.
| Adobe Commerce Version | Recommended Composer Version |
|---|---|
| 2.4.7+ | 2.9.8 |
| 2.4.4 – 2.4.6 | 2.2.28 |
How to Check Current Composer Version
Run:
composer --version
How to Upgrade Composer in Adobe Commerce Cloud
In Adobe Commerce Cloud, Composer version is configured inside the .magento.app.yaml file.
Update the composer_version value based on your Adobe Commerce version.
Example
runtime:
extensions:
- redis
- xsl
composer_version: "2.9.8"
For Adobe Commerce 2.4.4 – 2.4.6:
composer_version: "2.2.28"
After updating the file:
- Commit changes
- Push code to Cloud environment
- Redeploy the environment
Verify the Upgrade
After deployment:
composer --version
Important Note for Magento 2 Developers
This issue can also affect:
- GitHub Actions
- Jenkins pipelines
- GitLab CI/CD
- Docker containers
- Custom deployment scripts
If any deployment environment still uses old Composer versions, deployments may continue failing.
Conclusion
Adobe Commerce Cloud deployment failures after the recent Composer security update are now a common issue for Magento developers and merchants using outdated Composer versions. Since Composer now blocks vulnerable releases automatically, upgrading to the Adobe-recommended Composer version is necessary to maintain secure and successful deployments.
In Adobe Commerce Cloud, the fix is straightforward — update the composer_version value in the .magento.app.yaml file and redeploy the environment.
At Dhairvi Solutions, we help businesses manage Adobe Commerce Cloud deployments, Composer upgrades, Magento 2 maintenance, and performance optimization to keep eCommerce stores secure and stable.
FAQs
Why is Adobe Commerce Cloud deployment failing?
Composer now blocks vulnerable Composer versions after a recent security update.
Where should Composer version be updated in Adobe Commerce Cloud?
Inside the .magento.app.yaml file using composer_version.
Which Composer version should I use for Adobe Commerce 2.4.7+?
Adobe recommends Composer 2.9.8.
Do I need to run composer self-update on Cloud?
No. Adobe Commerce Cloud manages Composer through .magento.app.yaml.
Can outdated CI/CD environments still fail deployments?
Yes. Any environment using old Composer versions may continue failing.