Impact Score: 5/10
Cypress v9.4.0 โ Release Notes & Engineering Impact
Source available โ automated, not human-reviewed
Component: cypress ยท Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
โก Executive Summary (TL;DR)
Cypress v9.4.0. Source highlight: _Released 1/31/2022_
Who Does This Impact? (Role-Based Analysis)
๐ป Software Engineers & Devs
Check the source notes against the package and APIs you use before upgrading.
๐ Product & Engineering Leads
Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.
โ๏ธ DevOps & Security
Verify the target version, runtime requirements and rollback procedure in the official documentation.
โจ New Features & Capabilities (1)
- Added the `mimeType` property so you can explicitly set the mime type on
โก Performance & Enhancements (1)
- Enhancements were made to `.selectFile()` after receiving feedback after its
๐ง Bug Fixes & Patches (2)
- Fixed a regression in 9.3.0 to correctly
- Fixed regression in 9.2.1 where the
๐ View Raw Release Notes (Original Developer Log)
_Released 1/31/2022_
**Features**
- Enhancements were made to `.selectFile()` after receiving feedback after its
initial release in [9.3.0](https://docs.cypress.io/guides/references/changelog#9-3-0).
- The default behavior was updated to automatically infer the mime type of
files based on their extension to correctly encode file uploads. Addressed
in [#19751](https://github.com/cypress-io/cypress/issues/19751).
- Added the `mimeType` property so you can explicitly set the mime type on
files using the `mimeType` property. Addressed in
[#19751](https://github.com/cypress-io/cypress/issues/19751).
- Updated file contents types to allow either a
[`TypedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray)
instance or a `Cypress.Buffer` instance, where previously file contents were
expected to only be an instance of `Cypress.Buffer`. Addressed in
[#19751](https://github.com/cypress-io/cypress/issues/19751).
- Updated `.selectFile()` to retain the fileName of files read from disk to
work with aliases. Addressed in
[#19803](https://github.com/cypress-io/cypress/issues/19803).
**Bugfixes:**
- Fixed a regression in [9.3.0](https://docs.cypress.io/guides/references/changelog#9-3-0) to correctly
parse the `--spec` CLI parameter for glob patterns containing a range. Fixes
[#19783](https://github.com/cypress-io/cypress/issues/19783).
- Fixed regression in [9.2.1](https://docs.cypress.io/guides/references/changelog#9-1-1) where the
`--openssl-legacy-provider` flag was not being passed to the plugins' child
process when the user's system Node version was Node 17+ built with OpenSSL
v3+ which resulted in Cypress crashing when trying to run tests. Fixes
[#19712](https://github.com/cypress-io/cypress/issues/19712).
- Update `cy.type('{enter}')` to align with the W3C standards where a click
event should be dispatched when the Enter key is pressed and the current focus
is on astate-changing element with type `button`, `image`, `submit` or
`reset`. Fixes [#19541](https://github.com/cypress-io/cypress/issues/19541).