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CVE-2026-53940— Conda: Entry-point path traversal in noarch:python install (arbitrary file write) — canonical Python implementation

Quick assessment

Affected
conda conda
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Conda is a system-level binary package and environment manager that runs on major operating systems and platforms. Prior to 26.5.2, parse_entry_point_def in conda/common/path/python.py accepted an unvalidated entry-point command from a noarch:python package's

CVSS 8.8 · High EPSS 0.42% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
conda conda < 26.5.2 affected
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I. Basic Information for CVE-2026-53940

Vulnerability Information

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Vulnerability Title
Conda: Entry-point path traversal in noarch:python install (arbitrary file write) — canonical Python implementation
Source: CVE Program / CVE List V5
Vulnerability Description
Conda is a system-level binary package and environment manager that runs on major operating systems and platforms. Prior to 26.5.2, parse_entry_point_def in conda/common/path/python.py accepted an unvalidated entry-point command from a noarch:python package's info/link.json metadata. CreatePythonEntryPointAction in conda/core/path_actions.py interpolated that command into target_short_path, and PrefixPathAction.target_full_path joined it to the installation prefix without verifying that the result remained under the intended bin or Scripts directory. create_python_entry_point in conda/gateways/disk/create.py then wrote an executable wrapper to the resulting path. A malicious package could use path separators, traversal segments, or an absolute command path to write outside the prefix or overwrite another in-prefix entry point during default install and environment transactions. Out-of-prefix writes require the target parent directory to exist, while an overwritten entry point can execute attacker-controlled Python when later invoked with the installing user's privileges. This issue is fixed in version 26.5.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
conda conda < 26.5.2 -

II. Public POCs for CVE-2026-53940

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III. Intelligence Information for CVE-2026-53940

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Patches & Fixes for CVE-2026-53940 (2)

Other References for CVE-2026-53940 (2)

IV. Related Vulnerabilities

Same vendor: conda
Same weakness: CWE-22

V. Comments for CVE-2026-53940

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