CVE-2026-47425 Rattler vulnerable to entry-point path traversal in noarch:python install (arbitrary file write)
A malicious Conda package can write arbitrary files outside the installation prefix via path traversal in entry-point handling, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47425?
CVE-2026-47425 is a medium-severity path traversal vulnerability in conda pixi, published on 21 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-47425?
5 open source packages ship an affected version, including py-rattler and rattler.
| Package | Affected | Fixed in |
|---|---|---|
py-rattler PyPI | All versions | 0.24.0 |
py-rattler PyPI | All versions | 0.24.0 |
py-rattler PyPI | All versions | 0.24.0 |
rattler crates.io | All versions | 0.43.2 |
rattler crates.io | All versions | 0.43.2 |
How do I fix CVE-2026-47425?
Upgrade py-rattler to 0.24.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-47425 being exploited?
There is no known exploitation of CVE-2026-47425 in the wild and no public exploit code.
Sources
Also known as GHSA-q53q-5r4j-5729, PYSEC-2026-2971.