Sourced from axios's releases.

v1.21.1 — November 9, 2026

This release raises the minimum follow-redirects version to fix a published CVE, fixes a Next.js prerendering failure caused by the response duration timer, corrects the getAdapter typings, and includes documentation corrections, new test coverage, CI runner changes and dependency updates.

🔒 Security Fixes

• follow-redirects: Raised the follow-redirects range from ^1.16.0 to ^1.16.2 to fix CVE-2026-116689 (GHSA-mrwp-f3q8-3g9p). In the vulnerable versions, sensitiveHeaders arrays from another realm were ignored and custom credentials could follow redirects. Only the Node.js HTTP adapter is affected, and there are no API changes. (#11410)

🐛 Bug Fixes

• Response Duration: dispatchRequest now measures response.duration with performance.now() and uses Date.now() only when performance.now() isn't available. In v1.21.0, any axios request from a Server Component failed Next.js production builds with Cache Components (cacheComponents: true), because Next.js rejects Date.now() while prerendering. The duration is still a whole number of milliseconds, and system clock changes no longer affect it. (#11411)
• TypeScript: getAdapter now accepts an optional config?: AxiosRequestConfig in index.d.ts and index.d.cts, matching what it does at runtime. You can now call getAdapter('fetch', { env: { fetch: myFetch } }) without a cast. (#11404)

🔧 Maintenance & Chores

• Documentation Corrections: Brought the README and docs site in line with how axios actually behaves:

  • transformRequest runs for every method, and transformers receive (data, headers, status).
  • responseType and Content-Type have no default value.
  • AxiosHeaders#get and #normalize are described correctly.
  • Errors should be identified with axios.isAxiosError(), not by name.
  • The error tables now list ECONNREFUSED and ERR_FORM_DATA_DEPTH_EXCEEDED, and note that FormData parsing has a fixed depth limit that maxDepth doesn't change.
  • New notes cover what redact doesn't scan, which adapters enforce maxContentLength / maxBodyLength, and how formToJSON() handles field name collisions.

  (#11374, #11373, #11389, #11419, #11429, #11430)

• Docs Site: Added a Partners page, a shared card design for sponsors and partners, a Namespace sponsor badge, and a blog whose first post announces HeroDevs Never-Ending Support for Axios v0. Also applied the v1.20.0/v1.21.0 release notes to the docs, and fixed internal links in the es, fr and zh translations so they keep their locale prefix. (#11390, #11399, #11400, #11412, #11401)

• Test Coverage: Added cancellation tests across the HTTP, fetch and XHR adapters. They cover AbortSignal, CancelToken, cancelling while a request interceptor is pending, and timeout precedence. Also added tests for no_proxy edge cases in shouldBypassProxy, such as internationalized domain names, malformed CIDR and IPv4 entries, and port-qualified entries. Neither changes runtime behavior. (#11376, #11431)

• CI: GitHub Actions jobs now run on Namespace runners. The npm publish job stays on GitHub-hosted runners, because npm provenance and trusted publishing (OIDC) only work there. (#11396)

• Dependencies: Updated development and tooling dependencies, including vitest and @vitest/* (to 5.x at the root), typescript (7.x at the root), vite, rollup, eslint, playwright, @commitlint/*, @rollup/plugin-alias, @rollup/plugin-terser, body-parser, multer, serialize-javascript, fast-uri, qs, zizmorcore/zizmor-action, and follow-redirects in /docs. (#11383, #11375, #11372, #11345, #11392, #11387, #11386, #11385, #11391, #11388, #11395, #11421, #11422, #11426)

• Release: Prepared the 1.21.1 release. (#11435)

🌟 New Contributors

We are thrilled to welcome our new contributors. Thank you for helping improve axios:

• @​Ghoscro (#11374)
• @​pei711 (#11373)
• @​ivanhapaz (#11399)
• @​aelmanaa (#11404)
• @​Aryapatel-007 (#11429, #11430)
• @​umair-ghafoor-ai (#11376)
• @​yxshee (#11389)
• @​malinele (#11401)
• @​AnantDuhan (#11431)

Full Changelog

Sourced from axios's changelog.

Changelog

• 335e2f8 chore(release): prepare release 1.21.1 (#11435)
• c07e981 docs: note that FormData parsing has a fixed depth limit (#11430)
• f0fcec7 test(helpers): cover IDN, CIDR and port edge cases in shouldBypassProxy (#11431)
• 4f203a9 docs(i18n): add locale prefix to internal links in es, fr, zh docs (#11401)
• 98156ee docs: correct request config and AxiosHeaders descriptions (#11389)
• a81d62a test: cover cancellation lifecycle and timeout precedence (#11376)
• a42a19a docs: add missing error codes to the error tables (#11429)
• 1fcaf82 chore(deps-dev): refresh development dependencies (#11426)
• fb88a1b chore(deps-dev): bump the development_dependencies group with 4 updates (#11422)
• 31cc02a chore(deps): bump zizmorcore/zizmor-action from 0.7.1 to 0.8.0 in the github-...
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