GHSA-44vg-5wv2-h2hg
SimpleEval: Objects (including modules) can leak dangerous modules through to direct access inside the sandbox
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| PyPI | simpleeval | < 1.0.5 | 1.0.5 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
If the objects passed in as `names` to SimpleEval have modules or other disallowed / dangerous objects available as attrs.
Additionally, dangerous functions or modules could be accessed by passing them as callbacks to other safe functions to call.
Examples (found by @ByamB4):
Any module where non-underscore attribute chains reach os or sys:
- os.path, pathlib, shutil, glob (direct .os / .sys attributes)
- statistics (has .sys)
- numpy (has .ctypeslib.os and .f2py.sys)
- urllib.parse (has .warnings.sys)
### Patches
The latest version 1.0.5 has this issue fixed.
### Workarounds
Don't pass in objects or modules which have direct attributes to potentially dangerous items.
Use a wrapper to wrap the potentially vulnerable items (See the ModuleWrapper in version 1.0.5)
References
External links from the advisory. They lead to third-party sites.
- https://github.com/danthedeckie/simpleeval/security/advisories/GHSA-44vg-5wv2-h2hg
- https://nvd.nist.gov/vuln/detail/CVE-2026-32640
- https://github.com/danthedeckie/simpleeval
- https://github.com/danthedeckie/simpleeval/releases/tag/1.0.5
- https://github.com/pypa/advisory-database/tree/main/vulns/simpleeval/PYSEC-2026-132.yaml
- https://lists.debian.org/debian-lts-announce/2026/04/msg00023.html