Feature request: Add nodejs26.x runtime support

[rgoltz]

Please add nodejs26.x as a supported runtime in SAM CLI. Node.js 26 was released on 2026-05-05 as the upcoming LTS version.

I wish SAM CLI would support nodejs26.x for sam init, sam build, sam local invoke and sam local start-api.

Proposal

Analogous to existing nodejs22.x and nodejs24.x support, add nodejs26.x as a runtime option throughout the SAM CLI.

Prerequisites:

• [Feature Request] Add Node.js 26 base image (public.ecr.aws/lambda/nodejs:26) aws-lambda-base-images#488
• Feature request: Add Node.js 26 build image (nodejs26.x) aws-sam-build-images#193

If you're also waiting for this, please 👍 this issue.

Additional Details

Node.js 26 highlights:

• V8 engine updated to v14.6 (NODE_MODULE_VERSION 147)
• Stable TypeScript support
• Temporal API enabled by default

[reedham-aws]

Hello @rgoltz, thank you for reaching out! We will be working on this when nodejs26.x is released as a Lambda runtime in November 2026. The same goes for aws/aws-sam-build-images#193 and aws/serverless-application-model#3922.

[roger-zhangg]

Triage note on why this has not moved, since it has had no replies: the whole nodejs26.x chain is blocked on an upstream prerequisite that has not been actioned.

aws/aws-lambda-base-images#488 ("Add Node.js 26 base image") is still open and untouched since 2026-05-06. Nothing downstream can land before it:

1. [Feature Request] Add Node.js 26 base image (public.ecr.aws/lambda/nodejs:26) aws-lambda-base-images#488 — Lambda base image (blocker, unactioned)
2. Feature request: Add Node.js 26 build image (nodejs26.x) aws-sam-build-images#193 — SAM build image, needs (1)
3. [Feature Request] Add nodejs26.x runtime support to SAM specification serverless-application-model#3922 — SAM spec/transform accepts nodejs26.x, needs (2)
4. Feature request: Add nodejs26.x runtime support #8953 — SAM CLI runtime support, needs (2) and (3)

For reference, samtranslator currently tops out at nodejs24.x. Each of steps 2-4 is mechanical once unblocked; none of them is the thing to work on first.

Leaving this open and tracking #488 as the real dependency, so these stop looking simply ignored.