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PYSEC-2026-666

Mercurial Directory traversal vulnerability

Quick fix

PYSEC-2026-666 — mercurial: upgrade to the fixed version with the command below.

pip install --upgrade 'mercurial>=1.0.2'

Details

Directory traversal vulnerability in patch.py in Mercurial before 1.0.2 allows user-assisted attackers to modify arbitrary files via ".." (dot dot) sequences in a patch file.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/mercurial
Introduced in: 0Fixed in: 1.0.2
Fixpip install --upgrade 'mercurial>=1.0.2'

References