GHSA-gq8p-2329-gh3x: Duplicate Advisory Picklescan Has A Missing Detection Vulnerability

HIGH
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CVSS 8.1
CWE-502
Published
Advisory Summary

GHSA-gq8p-2329-gh3x is a HIGH (CVSS 8.1) picklescan has a missing detection vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Duplicate Advisory libraries in the PyPI ecosystem. The issue involves picklescan has a missing detection when calling built-in python idlelib.autocomplete.autocomplete.fetch_completions. Remediation is available by upgrading affected packages to version 0.0.29.

GHSA-gq8p-2329-gh3x at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-gq8p-2329-gh3x
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Duplicate Advisory
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix GHSA-gq8p-2329-gh3x

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

picklescan fixed: 0.0.29 
pip install picklescan>=0.0.29
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show picklescan

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-gq8p-2329-gh3x, inspect your installed packages using pip:

pip show picklescan

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.29), your application is affected.

Note: The pip show picklescan command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-7cq8-mj8x-j263. This link is maintained to preserve external references. ### Original Description picklescan before 0.0.29 fails to detect malicious pickle files using idlelib.autocomplete.AutoComplete.fetch_completions in reduce methods. Attackers can embed undetected code in pickle files that executes arbitrary commands when loaded by victims.

GHSA-gq8p-2329-gh3x Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
0.0.29
Product / Package Ecosystem Affected Versions Fixed Version
picklescan
pypi/picklescan
PyPI
< 0.0.29
0.0.29

References

GitHub Advisory / Wiki ADVISORY
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-7cq8-mj8x-j263
NVD — GHSA-gq8p-2329-gh3x NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-71376
www.vulncheck.com/advisories/picklesc... WEB
https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-undetected-idlelib-autocomplete-autocomplete-fetch-completions

Frequently Asked Questions

What is GHSA-gq8p-2329-gh3x?
GHSA-gq8p-2329-gh3x is a security vulnerability in Duplicate Advisory involving Picklescan has a missing detection when calling built-in python idlelib.autocomplete.AutoComplete.fetch_completions under CWE-502: Deserialization of Untrusted Data.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 0.0.29 across affected packages: picklescan.
What version fixes GHSA-gq8p-2329-gh3x?
Upgrading to 0.0.29 (or the latest patched release for your respective branch) resolves the vulnerability.
Is picklescan affected?
Yes, picklescan is affected in releases prior to 0.0.29. Upgrade your dependency to 0.0.29 or later.
What is the CVSS score of GHSA-gq8p-2329-gh3x?
GHSA-gq8p-2329-gh3x has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
What CWE is associated with GHSA-gq8p-2329-gh3x?
GHSA-gq8p-2329-gh3x is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check PyPI dependencies for GHSA-gq8p-2329-gh3x?
Run the dependency tree command: 'pip show picklescan'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gq8p-2329-gh3x",
  "modified" : "2026-09-23T18:13:27Z",
  "published" : "2026-06-23T15:32:36Z",
  "withdrawn" : "2026-09-23T18:13:27Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Picklescan has a missing detection when calling built-in python idlelib.autocomplete.AutoComplete.fetch_completions",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-7cq8-mj8x-j263. This link is maintained to preserve external references.\n\n### Original Description\npicklescan before 0.0.29 fails to detect malicious pickle files using idlelib.autocomplete.AutoComplete.fetch_completions in reduce methods. Attackers can embed undetected code in pickle files that executes arbitrary commands when loaded by victims.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "picklescan"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.29"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-7cq8-mj8x-j263"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-71376"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-undetected-idlelib-autocomplete-autocomplete-fetch-completions"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-23T18:13:27Z",
    "nvd_published_at" : "2026-06-23T13:16:38Z"
  }
}