Vulnerability-Lookup

PYSEC-2026-1874

Vulnerability from pysec - Published: 2026-07-07 14:34 - Updated: 2026-07-07 17:25

Details

Impact

Via a type confusion bug in the CPython interpreter when using try/except* RestrictedPython could be bypassed.

We believe this should be fixed upstream in Python itself until that we remove support for try/except* from RestrictedPython. (It has been fixed for some Python versions.)

Patches

Patched in version 8.0 by removing support for try/except* clauses

Workarounds

There is no workaround.

References

none

Severity

7.9 (High)


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

Impacted products

Name	purl
restrictedpython	pkg:pypi/restrictedpython

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "restrictedpython",
        "purl": "pkg:pypi/restrictedpython"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0"
            },
            {
              "fixed": "8.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.0",
        "6.1",
        "6.2",
        "7.0",
        "7.0a1.dev0",
        "7.0a1.dev1",
        "7.0a2.dev0",
        "7.1",
        "7.2",
        "7.2a1.dev0",
        "7.3",
        "7.4"
      ]
    }
  ],
  "aliases": [
    "CVE-2025-22153",
    "GHSA-gmj9-h825-chq2"
  ],
  "details": "### Impact\nVia a type confusion bug in the CPython interpreter when using `try/except*` RestrictedPython could be bypassed.\n\nWe believe this should be fixed upstream in Python itself until that we remove support for `try/except*` from RestrictedPython.\n(It has been fixed for some Python versions.)\n\n### Patches\nPatched in version 8.0 by removing support for `try/except*` clauses\n\n### Workarounds\nThere is no workaround.\n\n### References\nnone\n",
  "id": "PYSEC-2026-1874",
  "modified": "2026-07-07T17:25:17.745402Z",
  "published": "2026-07-07T14:34:49.069993Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-gmj9-h825-chq2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22153"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zopefoundation/RestrictedPython/commit/48a92c5bb617a647cffd0dadd4d5cfe626bcdb2f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/zopefoundation/RestrictedPython"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/restrictedpython"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-gmj9-h825-chq2"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter"
}

CVE-2025-22153 (GCVE-0-2025-22153)

Vulnerability from cvelistv5 – Published: 2025-01-23 17:34 – Updated: 2025-02-12 20:41

Title

try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter

Summary

RestrictedPython is a tool that helps to define a subset of the Python language which allows to provide a program input into a trusted environment. Via a type confusion bug in versions of the CPython interpreter starting in 3.11 and prior to 3.13.2 when using `try/except*`, RestrictedPython starting in version 6.0 and prior to version 8.0 could be bypassed. The issue is patched in version 8.0 of RestrictedPython by removing support for `try/except*` clauses. No known workarounds are available.

Severity

7.9 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-01-23 18:59 UTC

CWE

CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7761 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/zopefoundation/RestrictedPytho…	x_refsource_CONFIRM
https://github.com/zopefoundation/RestrictedPytho…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
zopefoundation	RestrictedPython	Affected: >= 6.0, < 8.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-22153",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-01-23T18:59:04.049782Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-12T20:41:29.946Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "RestrictedPython",
          "vendor": "zopefoundation",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 6.0, \u003c 8.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "RestrictedPython is a tool that helps to define a subset of the Python language which allows to provide a program input into a trusted environment. Via a type confusion bug in versions of the CPython interpreter starting in 3.11 and prior to 3.13.2 when using `try/except*`, RestrictedPython starting in version 6.0 and prior to version 8.0 could be bypassed. The issue is patched in version 8.0 of RestrictedPython by removing support for `try/except*` clauses. No known workarounds are available."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.9,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-843",
              "description": "CWE-843: Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-01-23T17:34:27.056Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-gmj9-h825-chq2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-gmj9-h825-chq2"
        },
        {
          "name": "https://github.com/zopefoundation/RestrictedPython/commit/48a92c5bb617a647cffd0dadd4d5cfe626bcdb2f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/zopefoundation/RestrictedPython/commit/48a92c5bb617a647cffd0dadd4d5cfe626bcdb2f"
        }
      ],
      "source": {
        "advisory": "GHSA-gmj9-h825-chq2",
        "discovery": "UNKNOWN"
      },
      "title": "try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-22153",
    "datePublished": "2025-01-23T17:34:27.056Z",
    "dateReserved": "2024-12-30T03:00:33.655Z",
    "dateUpdated": "2025-02-12T20:41:29.946Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-GMJ9-H825-CHQ2

Vulnerability from github – Published: 2025-01-23 17:19 – Updated: 2025-01-23 23:17

Summary

try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter

Details

Impact

Via a type confusion bug in the CPython interpreter when using try/except* RestrictedPython could be bypassed.

We believe this should be fixed upstream in Python itself until that we remove support for try/except* from RestrictedPython. (It has been fixed for some Python versions.)

Patches

Patched in version 8.0 by removing support for try/except* clauses

Workarounds

There is no workaround.

References

none

Severity

7.9 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "RestrictedPython"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0"
            },
            {
              "fixed": "8.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-22153"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-843"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-01-23T17:19:34Z",
    "nvd_published_at": "2025-01-23T18:15:33Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nVia a type confusion bug in the CPython interpreter when using `try/except*` RestrictedPython could be bypassed.\n\nWe believe this should be fixed upstream in Python itself until that we remove support for `try/except*` from RestrictedPython.\n(It has been fixed for some Python versions.)\n\n### Patches\nPatched in version 8.0 by removing support for `try/except*` clauses\n\n### Workarounds\nThere is no workaround.\n\n### References\nnone\n",
  "id": "GHSA-gmj9-h825-chq2",
  "modified": "2025-01-23T23:17:21Z",
  "published": "2025-01-23T17:19:34Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-gmj9-h825-chq2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22153"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zopefoundation/RestrictedPython/commit/48a92c5bb617a647cffd0dadd4d5cfe626bcdb2f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/zopefoundation/RestrictedPython"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter"
}

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.

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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.
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PYSEC-2026-1874

Impact

Patches

Workarounds

References

CVE-2025-22153 (GCVE-0-2025-22153)

GHSA-GMJ9-H825-CHQ2

Impact

Patches

Workarounds

References

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour