Features

Serverless Framework

• Added custom User-Agent header for AWS SDK requests. The framework now includes serverless-framework/<version> in the User-Agent header for all AWS SDK v3 API calls, improving request identification and diagnostics. (#13279, https://github.com/serverless/serverless/issues/13245)

Bug Fixes

Serverless Framework

• Fixed Lambda destinations error with per-function IAM roles. Resolved a TypeError that occurred when using Lambda destinations (onSuccess/onFailure) while provider.iam.role.mode: perFunction was enabled. The framework now correctly applies the required destination permissions to each function's individual IAM role. (#13293, #13292)
• Fixed custom domain security policy validation. Improved support for enhanced AWS security policies, specifically enabling TLS 1.3 policies like SecurityPolicy_TLS13_2025_EDGE. Legacy shorthand values (tls_1_0, tls_1_2) remain supported, while invalid tls_1_3 was removed. (#13294, #13290)