GHSA-5rph-q42j-36j9: Duplicate Advisory Picklescan Has Pickle Parsing Logic Vulnerability

CRITICAL
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CVSS 9.8
CWE-391
Published
Advisory Summary

GHSA-5rph-q42j-36j9 is a CRITICAL (CVSS 9.8) picklescan has pickle parsing logic vulnerability (CWE-391: Unchecked Error Condition) affecting Duplicate Advisory libraries in the PyPI ecosystem. The issue involves picklescan has pickle parsing logic flaw that leads to malicious pickle file bypass. Remediation is available in the latest vendor maintenance releases.

GHSA-5rph-q42j-36j9 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-5rph-q42j-36j9
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-391: Unchecked Error Condition
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-5rph-q42j-36j9

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-5rph-q42j-36j9, 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-391: Unchecked Error Condition, where [planned for deprecation. see maintenance notes and consider cwe-252, cwe-248, or cwe-1069.] ignoring exceptions and other error conditions may allow an attacker to induce unexpected behavior unnoticed. 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-9gvj-pp9x-gcfr. This link is maintained to preserve external references. ## Original Description picklescan before 0.0.27 contains a parsing logic error in the _list_globals function when handling STACK_GLOBAL opcodes, failing to track arguments in the correct range and allowing malicious pickle files to bypass detection. Attackers can craft pickle files with arguments at position zero to trigger unexpected exceptions and evade security scanning.

GHSA-5rph-q42j-36j9 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-9gvj-pp9x-gcfr
NVD — GHSA-5rph-q42j-36j9 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-71325
Security Fix Commit FIX COMMIT
https://github.com/mmaitre314/picklescan/commit/2a8383cfeb4158567f9770d86597300c9e508d0f
www.vulncheck.com/advisories/picklesc... WEB
https://www.vulncheck.com/advisories/picklescan-detection-bypass-via-stack-global-opcode-parsing-logic-flaw

Frequently Asked Questions

What is GHSA-5rph-q42j-36j9?
GHSA-5rph-q42j-36j9 is a security vulnerability in Duplicate Advisory involving Picklescan has pickle parsing logic flaw that leads to malicious pickle file bypass under CWE-391: Unchecked Error Condition.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: picklescan.
What version fixes GHSA-5rph-q42j-36j9?
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-5rph-q42j-36j9?
GHSA-5rph-q42j-36j9 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-5rph-q42j-36j9?
GHSA-5rph-q42j-36j9 is classified under CWE-391: Unchecked Error Condition ([PLANNED FOR DEPRECATION. SEE MAINTENANCE NOTES AND CONSIDER CWE-252, CWE-248, OR CWE-1069.] Ignoring exceptions and other error conditions may allow an attacker to induce unexpected behavior unnoticed.).
How can I check PyPI dependencies for GHSA-5rph-q42j-36j9?
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-5rph-q42j-36j9",
  "modified" : "2026-06-18T14:40:53Z",
  "published" : "2026-06-17T18:35:56Z",
  "withdrawn" : "2026-06-18T14:40:53Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Picklescan has pickle parsing logic flaw that leads to malicious pickle file bypass",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-9gvj-pp9x-gcfr. This link is maintained to preserve external references.\n\n## Original Description\n\npicklescan before 0.0.27 contains a parsing logic error in the _list_globals function when handling STACK_GLOBAL opcodes, failing to track arguments in the correct range and allowing malicious pickle files to bypass detection. Attackers can craft pickle files with arguments at position zero to trigger unexpected exceptions and evade security scanning.",
  "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" : "< 0.0.27"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9gvj-pp9x-gcfr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-71325"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mmaitre314/picklescan/commit/2a8383cfeb4158567f9770d86597300c9e508d0f"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/picklescan-detection-bypass-via-stack-global-opcode-parsing-logic-flaw"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-391" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-18T14:40:53Z",
    "nvd_published_at" : "2026-06-17T17:16:41Z"
  }
}