--- title: "AWS Lambda .NET 9 container runtime deprecation: 2026-11-10 | Harbyn" description: "AWS Lambda .NET 9 container runtime deprecation, effective Nov 10, 2026." canonical: "https://harbyn.com/changes/aws-lambda/2026-10-08-net-9-container-runtime-deprecation" last-updated: 2026-10-08 --- # AWS Lambda .NET 9 container runtime deprecation Markdown version of . Deprecation - AWS Lambda. low severity. Announced. Upcoming. Lambda forecasts deprecation of the dotnet9 runtime (container image only, Amazon Linux 2023) on 2026-11-10: patches and support end then. No block on function creation or updates is scheduled; existing functions can still be invoked. 16 days left: the deadline is Nov 10, 2026. ## Facts | Fact | Value | | --- | --- | | Vendor | [AWS Lambda](https://harbyn.com/vendors/aws-lambda.md) | | Kind | Deprecation | | Severity | low | | Status | Announced | | Announced | Oct 8, 2026 (undated by the vendor; already published when we first read the page) | | Effective | Nov 10, 2026 | | Added to Harbyn | Oct 8, 2026 | | Lead time | 33 days of warning | | Symbols | `dotnet9` | | Review | Reviewed by a person, extracted by a model | ## Find it in your code ```sh npx harbyn scan ``` This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses AWS Lambda, from its packages and API hosts. Nothing leaves your machine. ## Sources Where this event comes from: the page we read, when we read it, and the hash of that snapshot. - (deprecations, fetched 2026-10-08 17:16 UTC, sha256 `4c935c677b47233e852196847b085438e64df4f9ef903345d91f583ba50e8594`) ## Related changes ### More from AWS Lambda - [Amazon Linux 2023 OS-only runtime deprecation](https://harbyn.com/changes/aws-lambda/2026-10-08-amazon-linux-2023-os-only-runtime-deprecation.md) (Deprecation, effective Jun 30, 2029) - [functions on 8 deprecated runtimes cannot be created from July 29, 2027 or updated from August 31, 2027](https://harbyn.com/changes/aws-lambda/2026-10-08-deprecated-runtimes-block-create-2027-07-29-and-update-2027-08-31.md) (Deprecation, effective Jul 29, 2027) - [Java 11 on Amazon Linux 2 runtime deprecation](https://harbyn.com/changes/aws-lambda/2026-10-08-java-11-on-amazon-linux-2-runtime-deprecation.md) (Deprecation, effective Jun 30, 2027) - [Java 11 on Amazon Linux 2023 runtime deprecation](https://harbyn.com/changes/aws-lambda/2026-10-08-java-11-on-amazon-linux-2023-runtime-deprecation.md) (Deprecation, effective Jun 30, 2029) ### Changes at other vendors - [Jira / Atlassian Cloud: Atlassian Analytics dashboard subscriptions being removed](https://harbyn.com/changes/atlassian-jira/2026-08-10-atlassian-analytics-dashboard-subscriptions-being-removed.md) (effective Nov 2, 2026) - [Google Cloud Run and Functions: .NET 8 runtime deprecation](https://harbyn.com/changes/google-cloud/2026-10-08-net-8-runtime-deprecation.md) (effective Nov 10, 2026) - [GitHub: X-GitHub-Stateless-S2S-Token header ignored from 2026-11-30](https://harbyn.com/changes/github/2026-10-02-x-github-stateless-s2s-token-header-ignored-from-2026-11-30.md) (effective Nov 30, 2026) - [Supabase: @supabase/server framework adapters are deprecated and will be removed on December 1, 2026](https://harbyn.com/changes/supabase/2026-10-05-framework-adapters-in-supabase-server-are-deprecated.md) (effective Dec 1, 2026) [All upcoming deadlines](https://harbyn.com/deadlines.md)