GHSA-44VG-5WV2-H2HG
Vulnerability from github – Published: 2026-03-13 20:56 – Updated: 2026-03-16 22:00
VLAI?
Summary
SimpleEval: Objects (including modules) can leak dangerous modules through to direct access inside the sandbox
Details
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)
Severity ?
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "simpleeval"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-32640"
],
"database_specific": {
"cwe_ids": [
"CWE-915",
"CWE-94"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-13T20:56:26Z",
"nvd_published_at": "2026-03-16T14:19:40Z",
"severity": "HIGH"
},
"details": "### Impact\nIf the objects passed in as `names` to SimpleEval have modules or other disallowed / dangerous objects available as attrs.\nAdditionally, dangerous functions or modules could be accessed by passing them as callbacks to other safe functions to call.\n\nExamples (found by @ByamB4):\n\nAny module where non-underscore attribute chains reach os or sys:\n- os.path, pathlib, shutil, glob (direct .os / .sys attributes)\n- statistics (has .sys)\n- numpy (has .ctypeslib.os and .f2py.sys)\n- urllib.parse (has .warnings.sys)\n\n### Patches\nThe latest version 1.0.5 has this issue fixed.\n\n### Workarounds\nDon\u0027t pass in objects or modules which have direct attributes to potentially dangerous items.\nUse a wrapper to wrap the potentially vulnerable items (See the ModuleWrapper in version 1.0.5)",
"id": "GHSA-44vg-5wv2-h2hg",
"modified": "2026-03-16T22:00:13Z",
"published": "2026-03-13T20:56:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/danthedeckie/simpleeval/security/advisories/GHSA-44vg-5wv2-h2hg"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32640"
},
{
"type": "PACKAGE",
"url": "https://github.com/danthedeckie/simpleeval"
},
{
"type": "WEB",
"url": "https://github.com/danthedeckie/simpleeval/releases/tag/1.0.5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "SimpleEval: Objects (including modules) can leak dangerous modules through to direct access inside the sandbox"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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