Release Notes

Released on 2026-06-11.

Python

• Add CPython 3.13.14 and 3.14.6 (#19787)

Preview features

• Add environment.root to uv workspace metadata --sync (#19760)
• Allow uv upgrade to update a single dependency constraint (#19738)
• Compute and pass uv workspace metadata payload in ty check (#19763)
• Make packaged applications the default for uv init (#17841)

Performance

• Add parallel discovery of Python versions for uv python list (#18684)
• Avoid normalizing source distribution names twice (#19784)

Bug fixes

• Improve cache robustness and pruning behavior
  • Allow CI cache pruning without an sdist bucket (#19802)
  • Avoid overflow when reading malformed cache entries (#19799)
  • Preserve cached Python downloads during cache pruning (#19795)
  • Reject running inside the cache (#19659)
• Fix Python discovery and version request edge cases
  • Avoid panics for Unicode Python version requests (#19797)
  • Fix handling of non-critical errors in uv python list with path requests (#19774)
  • Fix stop-discovery-at regression (#19769)
• Harden parsing and validation for package metadata, requirements, markers, URLs, and conflict sets
  • Allow trailing commas in version specifiers (#19806)
  • Avoid panics for invalid UTF-8 URL credentials (#19800)
  • Avoid panics for malformed source distribution filenames (#19776)
  • Avoid panics for trailing extra separators (#19779)
  • Avoid stack overflow for recursive requirements path aliases (#19777)
  • Ignore reversed string compatible-release markers (#19782)
  • Reject duplicate entries in conflict sets (#19801)
  • Reject malformed hash options in requirements files (#19783)
  • Reject source distribution filenames without a separator (#19803)
  • Use UTF-8 lengths for requirement errors (#19781)
  • Use UTF-8 lengths for trailing marker errors (#19796)
  • Use byte offsets when peeking over requirements (#19780)
  • Validate GraalPy ABI suffixes (#19805)
• Improve wheel entry-point error handling and virtual environment activation quoting
  • Propagate errors when reading wheel entry points (#19794)
  • Quote virtual environment activation paths with shell metacharacters (#19798)

Install uv 0.11.21

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/uv/releases/download/0.11.21/uv-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/uv/releases/download/0.11.21/uv-installer.ps1 | iex"

Download uv 0.11.21

File	Platform	Checksum
uv-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
uv-x86_64-apple-darwin.tar.gz	Intel macOS	checksum
uv-aarch64-pc-windows-msvc.zip	ARM64 Windows	checksum
uv-i686-pc-windows-msvc.zip	x86 Windows	checksum
uv-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
uv-aarch64-unknown-linux-gnu.tar.gz	ARM64 Linux	checksum
uv-i686-unknown-linux-gnu.tar.gz	x86 Linux	checksum
uv-powerpc64le-unknown-linux-gnu.tar.gz	PPC64LE Linux	checksum
uv-riscv64gc-unknown-linux-gnu.tar.gz	RISCV Linux	checksum
uv-s390x-unknown-linux-gnu.tar.gz	S390x Linux	checksum
uv-x86_64-unknown-linux-gnu.tar.gz	x64 Linux	checksum
uv-armv7-unknown-linux-gnueabihf.tar.gz	ARMv7 Linux	checksum
uv-aarch64-unknown-linux-musl.tar.gz	ARM64 MUSL Linux	checksum
uv-i686-unknown-linux-musl.tar.gz	x86 MUSL Linux	checksum
uv-riscv64gc-unknown-linux-musl.tar.gz	RISCV MUSL Linux	checksum
uv-x86_64-unknown-linux-musl.tar.gz	x64 MUSL Linux	checksum
uv-arm-unknown-linux-musleabihf.tar.gz	ARMv6 MUSL Linux (Hardfloat)	checksum
uv-armv7-unknown-linux-musleabihf.tar.gz	ARMv7 MUSL Linux	checksum

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo astral-sh/uv

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>