AWS Lambda introduces managed runtimes in public preview for Node.js 26 and Python 3.15
AWS Lambda ยท 2026-08-25
Actions
Technical Details
| Affected Versions | Node.js 26, Python 3.15 |
|---|---|
| Regions | all AWS commercial Regions, AWS GovCloud (US) Regions, China Regions |
| Breaking Change | Yes |
| Cost Impact | Neutral |
| IaC Impact | High |
What This Means
For DevOps Teams
Update your AWS Lambda functions to use the Node.js 26 (Preview) or Python 3.15 (Preview) runtimes, allowing you to test compatibility with your workloads and report any issues before the general availability release, minimizing potential disruptions and ensuring a smooth transition.
For Platform Teams
Adopt the managed runtimes preview for Node.js 26 and Python 3.15 in your AWS Lambda deployments, enabling your platform team to validate compatibility with your infrastructure-as-code tools and deployment frameworks, and providing an opportunity to identify and address any potential issues before the general availability release.
For Executives
Evaluate the managed runtimes preview for Node.js 26 and Python 3.15 to gain early access to upcoming features and provide valuable feedback to AWS Lambda team, ensuring alignment with your organization's technology roadmap and reducing potential risks associated with future upgrades.
Source
Related AWS Lambda Updates
- AWS Lambda MicroVMs now supports AWS PrivateLink (2026-08-25)
- AWS Lambda MicroVMs is now available in 5 additional AWS regions (2026-08-19)
- Introducing public preview runtimes on AWS Lambda, starting with Node.js 26 and Python 3.15 (2026-08-15)
- AWS Lambda announces scalable network bandwidth up to 3,000 Mbps for functions outside a VPC (2026-08-05)
- Announcing response streaming for .NET on AWS Lambda (2026-08-05)