rattler has an entry-point path traversal in noarch:python install (arbitrary file write)
Summary
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, rattler-build, some methods in py-rattler, and any other consumer of the rattler install crate; no flag or post-link-script opt-in is involved.
Resolved in https://github.com/conda/rattler/pull/2445, released in rattler 0.43.2.
Affected
- Repository: https://github.com/conda/rattler
- Commit:
a0e61a33da8b9d6de712fab2a879fa9da977e6e3(HEAD at audit time, 2026-05-13 release) - Downstream consumers reached through the same code path:
prefix-dev/pixi@e640477 - pixi 0.69.0 and rattler-build 0.65.0 fix this issue
Researcher
Berkant Koc me@berkoc.com PGP: 0C588DFD76204987284213EA0AC529C41F8AA5D6
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | py-rattler | < 0.24.0 | 0.24.0 |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U- Weakness (CWE)
CWE-22, CWE-73- Platform
- Python (PyPI)
- Package
py-rattler- Disclosed
- 01.06.2026
- Updated
- 11.10.2026 14:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2971 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-q53q-5r4j-5729 - CC BY 4.0
Vulnerability history: py-rattler
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 06.2026 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2026: 2
-
rattler has an entry-point path traversal in noarch:python install (arbitrary file write) this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.