v1.0.124 Claude Code Release Notes

Sep 25, 2025

Claude's Analysisby Sonnet 4.6

Security hole patched in Bash tool permissions; Claude no longer sees allowed-tool lists on denial. Bedrock/Vertex env var truthy bug fixed; VS Code large-file perf improved.

Changes

Total Changes (vs Average)

0.4×

Version Type

Patch

Release Focus

Mixed

Day Since Prior Release

Release # This Month

#12 of 15

Bug Fix Ratio

20%

Post-Release Edits

—

Change Category

Ecosystem Impact

Key Themes

3Bash Security Hardening|1Cloud Provider Env Var Correctness|1VS Code Large-File Performance

May Help If You've Noticed

Your Bedrock or Vertex integration behaves oddly — env vars like 'false' or '0' were silently treated as enabled

Improved1 change

•Improved VSCode extension performance for large files

Fixed1 change

•Fixed security vulnerability in Bash tool permission checks

Other3 changes

•Set CLAUDE_BASH_NO_LOGIN environment variable to 1 or true to to skip login shell for BashTool
•Fix Bedrock and Vertex environment variables evaluating all strings as truthy
•No longer inform Claude of the list of allowed tools when permission is denied

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v1.0.124 Claude Code Release Notes

Sep 25, 2025

Claude's Analysisby Sonnet 4.6

Full Analysis

Security hole patched in Bash tool permissions; Claude no longer sees allowed-tool lists on denial. Bedrock/Vertex env var truthy bug fixed; VS Code large-file perf improved.

Changes

Total Changes (vs Average)

0.4×

Version Type

Patch

Release Focus

Mixed

Day Since Prior Release

Release # This Month

#12 of 15

Bug Fix Ratio

20%

Post-Release Edits

—

Change Category

Ecosystem Impact

Key Themes

3Bash Security Hardening|1Cloud Provider Env Var Correctness|1VS Code Large-File Performance

May Help If You've Noticed

Your Bedrock or Vertex integration behaves oddly — env vars like 'false' or '0' were silently treated as enabled

Improved1 change

•Improved VSCode extension performance for large files

Fixed1 change

•Fixed security vulnerability in Bash tool permission checks

Other3 changes

•Set CLAUDE_BASH_NO_LOGIN environment variable to 1 or true to to skip login shell for BashTool
•Fix Bedrock and Vertex environment variables evaluating all strings as truthy
•No longer inform Claude of the list of allowed tools when permission is denied

v1.0.124 Claude Code Release Notes

Changes in Claude Code v1.0.124

Improved1 change

Fixed1 change

Other3 changes

v1.0.124 Claude Code Release Notes

Changes in Claude Code v1.0.124

Improved1 change

Fixed1 change

Other3 changes