Axios Release Notes & Changelog

v0.34.0 — September 13, 2026

This release hardens request configuration and proxy handling, adds caller diagnostics and cancellation context, and tightens TypeScript header types.

⚠️ Breaking Changes & Deprecations

• Header Types: TypeScript now rejects header values that are Promises, functions, or objects with custom toString() methods. Resolve promises, call functions, or explicitly convert objects before assigning header values. Supported scalar, array, and grouped headers remain available. (#11209)

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v1.19.0 - July 22, 2026

This release raises the form-data security floor, adds configuration and type-system capabilities, and fixes NO_PROXY matching, interceptor errors, progress reporting, and serialization edge cases.

🔒 Security Fixes

• Multipart Form Data: Raised the form-data dependency floor to ^4.0.6, preventing fresh installations from resolving versions affected by the CRLF injection vulnerability GHSA-hmw2-7cc7-3qxx (https://github.com/advisories/GHSA-hmw2-7cc7-3qxx). (#11028)

🚀 New Features

• Configuration Extensibility: Preserved own-enumerable symbol-keyed fields through mergeConfig

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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)

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v1.18.0 — June 13, 2026

This release hardens redirect and URL handling, improves the validateStatus configuration semantics, and includes updates to documentation, dependencies, and release metadata.

🔒 Security Fixes

• Redirect Header Safety: Added Node HTTP adapter support for stripping caller-specified sensitive headers on cross-origin redirects, helping prevent custom auth headers such as API keys from leaking to another origin. (#10892)

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v0.33.0 — June 13, 2026

This release hardens request config handling and form serialisation, adds Node.js 26 coverage for v0.x, and updates the v0.x release workflow.

🔒 Security Fixes

• Request Config Hardening: Uses own-property reads for nested request options affecting auth, params, proxy, and data handling; adds bounded form serialisation depth checks; normalises nullish Basic Auth credentials; and treats 0.0.0.0 as local for proxy bypass. (#11001)

🚀 New Features

• Node.js 26: Adds Node.js 26 to the v0.x CI and release/publish matrices. (#10937)

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v1.17.0 — June 1, 2026

This release adds Node HTTP zstd decompression, hardens config and release workflows, and fixes authentication, header, proxy, and type-handling regressions.

🔒 Security Fixes

• Config Hardening: Guarded socketPath, params, and paramsSerializer reads with own-property checks to prevent inherited prototype values from affecting request behavior, including SSRF-sensitive paths. (#10901, #10922)
• Release Publishing: Switched the publish workflow to npm staged publishing for safer, auditable package releases with provenance. (#10926)

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v1.16.1 — May 13, 2026

This release ships a defence-in-depth fix for prototype pollution in formDataToJSON, hardens proxy and CI workflows, restores Webpack 4 compatibility for the fetch adapter, and includes several small bug fixes and maintenance improvements.

🔒 Security Fixes

• Prototype Pollution Defence-in-Depth: Hardened formDataToJSON against already-polluted Object.prototype by walking own properties only, so attacker-controlled keys inherited from a poisoned prototype cannot propagate through deserialization. (#7413)

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v0.32.0 — May 4, 2026

This release backports a comprehensive set of security and hardening fixes from the v1.x branch into v0.x, covering prototype-pollution protections, default error redaction, stricter proxy/cookie/socket handling, and one breaking change to merged config and header object prototypes.

⚠️ Breaking Changes & Deprecations

• Null-prototype merged objects: mergeConfig and header merging now return objects with a null prototype to block prototype-pollution gadgets. Consumers must use Object.prototype.hasOwnProperty.call(obj, key) and avoid implicit string coercion against merged

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v1.16.0 — May 2, 2026

This release adds support for the QUERY HTTP method and a new ECONNREFUSED error constant, lands a substantial wave of HTTP, fetch, and XHR adapter bug fixes around redirects, aborts, headers, and timeouts, and welcomes 23 new contributors.

⚠️ Notable Changes

A handful of fixes in this release are either security-adjacent or change observable behaviour. Please review before upgrading:

• Fetch adapter now enforces maxBodyLength and maxContentLength. These limits were silently ignored on the fetch adapter prior to 1.16.0 — anyone relying on them as a safety net (DoS protection,

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