Medium severity · published Jul 21, 2026
CVE-2026-47425
Rattler vulnerable to entry-point path traversal in noarch:python install (arbitrary file write)
6.9
CVSS
0.2%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PI
pixi · prefix-dev
< 0.69.0 · source: vendor
PY
py-rattler · conda
< 0.24.0 · source: vendor
RA
rattler · conda
< 0.43.2 · source: vendor
RA
rattler-build · conda
< 0.65.0 · source: vendor