GHSA-4mpj-78p6-rj59: Duplicate Advisory PickleScan's Profile.run Blocklist Mismatch Allows Vulnerability

CRITICAL
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CVSS 9.8
CWE-184
Published
Advisory Summary

GHSA-4mpj-78p6-rj59 is a CRITICAL (CVSS 9.8) picklescan's profile.run blocklist mismatch allows vulnerability (CWE-184: Incomplete List of Disallowed Inputs) affecting Duplicate Advisory libraries in the PyPI ecosystem. The issue involves picklescan's profile.run blocklist mismatch allows exec() bypass. Remediation is available in the latest vendor maintenance releases.

GHSA-4mpj-78p6-rj59 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-4mpj-78p6-rj59
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-184: Incomplete List of Disallowed Inputs
Affected Product Duplicate Advisory
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:N/S:U/C:H/I:H/A:H).

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

How to Fix GHSA-4mpj-78p6-rj59

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: Latest secure release 
pip install picklescan>=Latest secure release
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-4mpj-78p6-rj59, 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 the patched release), 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-184: Incomplete List of Disallowed Inputs, where the product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete. 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-7wx9-6375-f5wh. This link is maintained to preserve external references. ## Original Description picklescan before 1.0.4 contains an incomplete blocklist for the profile module that fails to block the module-level profile.run() function, allowing attackers to achieve arbitrary code execution via exec(). Attackers can craft malicious pickle files calling profile.run(statement) to execute arbitrary Python code while picklescan reports zero security issues.

GHSA-4mpj-78p6-rj59 Affected Duplicate Advisory Versions

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

References

GitHub Advisory / Wiki ADVISORY
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-7wx9-6375-f5wh
NVD — GHSA-4mpj-78p6-rj59 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53873
www.vulncheck.com/advisories/picklesc... WEB
https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-profile-run-blocklist-bypass

Frequently Asked Questions

What is GHSA-4mpj-78p6-rj59?
GHSA-4mpj-78p6-rj59 is a security vulnerability in Duplicate Advisory involving PickleScan's profile.run blocklist mismatch allows exec() bypass under CWE-184: Incomplete List of Disallowed Inputs.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: picklescan.
What version fixes GHSA-4mpj-78p6-rj59?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is picklescan affected?
Yes, picklescan is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-4mpj-78p6-rj59?
GHSA-4mpj-78p6-rj59 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-4mpj-78p6-rj59?
GHSA-4mpj-78p6-rj59 is classified under CWE-184: Incomplete List of Disallowed Inputs (The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.).
How can I check PyPI dependencies for GHSA-4mpj-78p6-rj59?
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-4mpj-78p6-rj59",
  "modified" : "2026-06-18T14:43:09Z",
  "published" : "2026-06-17T18:35:57Z",
  "withdrawn" : "2026-06-18T14:43:09Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: PickleScan's profile.run blocklist mismatch allows exec() bypass",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-7wx9-6375-f5wh. This link is maintained to preserve external references.\n\n## Original Description\npicklescan before 1.0.4 contains an incomplete blocklist for the profile module that fails to block the module-level profile.run() function, allowing attackers to achieve arbitrary code execution via exec(). Attackers can craft malicious pickle files calling profile.run(statement) to execute arbitrary Python code while picklescan reports zero security issues.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 1.0.4"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-7wx9-6375-f5wh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-53873"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-profile-run-blocklist-bypass"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-184" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-18T14:43:09Z",
    "nvd_published_at" : "2026-06-17T17:17:25Z"
  }
}