v1.18.1 — June 21, 2026
This release focuses on Node HTTP adapter fixes, safer AxiosError serialisation, runtime/type correctness fixes, documentation updates, and dependency maintenance.
🐛 Bug Fixes
- AxiosError Serialisation: Made AxiosError#cause non-enumerable to prevent circular JSON serialisation failures when errors include nested causes. (#10913)
- Node HTTP Adapter: Guarded socket.setKeepAlive for proxy agent streams, accepted path-only URLs when socketPath is configured, deferred environment proxy handling to Node, and explicitly passed maxBodyLength through to follow-redirects. (#10917, #10930, #10942, #10993)
- Runtime and Type Correctness: Fixed several runtime crashes, type definition mismatches, and incorrect error handling paths. (#10959, #11021)
- AxiosURLSearchParams: Switched the encoder callback to an arrow function so
encoder.call(this)receives theAxiosURLSearchParamsinstance correctly. (#11019)
🔧 Maintenance & Chores
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Documentation: Documented sensitive headers and status transition behaviour, prepared cleaned-up docs, added Deno install instructions, and clarified that request data is request-specific (#11007, #11010, #11023, #11025)
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Dependencies: Bumped vite, rollup, form-data, js-yaml, and multer across the root project, docs, smoke tests, and module test workspaces. (#11011, #11012, #11013, #11014, , , , )