CVE-2026-47425 Details
Description
Rattler is a library that provides common functionality used within the conda ecosystem. Prior to version 0.43.2, `EntryPoint::FromStr` in `rattler_conda_types` performs only `.trim()` on the `command` field before the linker joins it onto the install prefix and writes an executable Python script. A malicious `noarch:python` package can ship an `info/link.json` with an entry-point name containing `..`, `/`, `\`, or an absolute path; the resulting file is written outside the prefix (or clobbers an existing in-prefix entry-point such as `bin/pip`) with mode `0o775` on Unix and a copied launcher `.exe` on Windows. This affects the default install path of `pixi install`, `mamba install` via py-rattler, `rattler-build`, and any other consumer of the `rattler` install crate; no flag or post-link-script opt-in is involved. Version 0.43.2 contains a fix for the issue.
A path traversal vulnerability has been identified in the Rattler library, specifically in versions prior to 0.43.2. The issue arises in the 'EntryPoint::FromStr' function within 'rattler_conda_types', which only trims the 'command' field before it is joined with the installation prefix to create an executable Python script. This flaw allows a malicious 'noarch:python' package to include an 'info/link.json' file with an entry point name that contains path traversal sequences, such as '..', '/', '\', or an absolute path. Consequently, the generated file may be written outside the intended prefix, or overwrite an existing in-prefix entry point like 'bin/pip', with Unix file permissions of '0o775' or as a copied launcher '.exe' on Windows. This vulnerability impacts the default installation paths used by 'pixi install', 'mamba install' via py-rattler, 'rattler-build', and other tools that utilize the 'rattler' installation crate. Notably, no special flags or post-link script opt-ins are required to exploit this vulnerability.
Users can upgrade to Rattler version 0.43.2 or later to address this vulnerability. For those using the Rattler library within a Python environment, upgrading to Rattler version 0.24.0 is recommended.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 21, 2026CISA-ADP
Assessed Jul 23, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/conda/rattler/commit/4f06eca89aa13209774d26dbac077c41b72bac7c | [email protected] | Source CodeVendor |
| https://github.com/conda/rattler/security/advisories/GHSA-q53q-5r4j-5729 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
| CWE-73 | External Control of File Name or Path | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| conda Rattler | < 0.43.2 (semver) |
CPE
Remediation
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| py-rattler | All versions |
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| pixi | All versions |
CPE
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| rattler-build | All versions |
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Modified | CISA-ADP |
| Jul 21, 2026 | New CVE Received | [email protected] |