picklescan before 0.0.29 fails to detect malicious pickle files that exploit idlelib.autocomplete.AutoComplete.get_entity function in reduce methods. Attackers can embed undetected code in pickle files that executes arbitrary commands when loaded by victims using pickle.load().
PUBLISHED5.2CWE-502
picklescan - Remote Code Execution via idlelib.autocomplete.AutoComplete.get_entity
Problem type
Affected products
picklescan
picklescan
< 0.0.29 - AFFECTED
0.0.29 - UNAFFECTED
References
GitHub Security Advisory (GHSA-6w4w-5w54-rjvr)
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-6w4w-5w54-rjvr
VulnCheck Advisory: picklescan - Remote Code Execution via idlelib.autocomplete.AutoComplete.get_entity
https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-idlelib-autocomplete-autocomplete-get-entity
GitHub Security Advisories
GHSA-6w4w-5w54-rjvr
Picklescan has a missing detection when calling built-in python idlelib.autocomplete.AutoComplete.get_entity
https://github.com/advisories/GHSA-6w4w-5w54-rjvrSummary
Using idlelib.autocomplete.AutoComplete.get_entity, which is a built-in python library function to execute remote pickle file.
Details
The attack payload executes in the following steps:
First, the attacker craft the payload by calling to idlelib.autocomplete.AutoComplete.get_entity function in reduce method Then when the victim after checking whether the pickle file is safe by using Picklescan library and this library doesn't dectect any dangerous functions, decide to pickle.load() this malicious pickle file, thus lead to remote code execution.
PoC
class EvilIdlelibAutocompleteGetEntity:
def __reduce__(self):
from idlelib.autocomplete import AutoComplete
return AutoComplete().get_entity, ("__import__('os').system('whoami')",)
Impact
Who is impacted? Any organization or individual relying on picklescan to detect malicious pickle files inside PyTorch models. What is the impact? Attackers can embed malicious code in pickle file that remains undetected but executes when the pickle file is loaded. Supply Chain Attack: Attackers can distribute infected pickle files across ML models, APIs, or saved Python objects.
Corresponding
JSON source
https://cveawg.mitre.org/api/cve/CVE-2025-71358Click to expand
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"dateUpdated": "2026-06-22T21:04:42.672Z",
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"datePublic": "2025-08-26T00:00:00.000Z",
"title": "picklescan - Remote Code Execution via idlelib.autocomplete.AutoComplete.get_entity",
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"value": "picklescan before 0.0.29 fails to detect malicious pickle files that exploit idlelib.autocomplete.AutoComplete.get_entity function in reduce methods. Attackers can embed undetected code in pickle files that executes arbitrary commands when loaded by victims using pickle.load()."
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