CVE-2026-23986: PYSEC-2026-1272 - Copier safe template has arbitrary filesystem write access via directory symlinks when _preserve_symlinks: true

CVE-2026-23986 · Severity: low · CVSS 3.1 · Published 2026-07-07

Copier safe template has arbitrary filesystem write access via directory symlinks when _preserve_symlinks: true

Technologies: copier (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-23986 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-23986 being exploited in the wild.
How severe is CVE-2026-23986?
Low severity, with a CVSS score of 3.1, published 7 July 2026.
Which products and versions are affected?
copier (PyPI) ECOSYSTEM:introduced=0,fixed=9.11.2.
Is there a fix for CVE-2026-23986?
Yes. copier (PyPI): upgrade to 9.11.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-23986?
Check whether you run copier (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • copier (PyPI): upgrade to 9.11.2 or later
    pip install "copier>=9.11.2"

Affected products

  • copier (PyPI) ECOSYSTEM:introduced=0,fixed=9.11.2

Identifiers

  • CVE-2026-23986
  • GHSA-4fqp-r85r-hxqh
  • PYSEC-2026-1272

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