CVE-2025-4435 (GCVE-0-2025-4435)

Vulnerability from cvelistv5 – Published: 2025-06-03 12:59 – Updated: 2026-04-21 20:16
VLAI?
Title
Tarfile extracts filtered members when errorlevel=0
Summary
When using a TarFile.errorlevel = 0 and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0 in affected versions is that the member would still be extracted and not skipped.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
Assigner
PSF
References
Impacted products
Vendor Product Version
Python Software Foundation CPython Affected: 0 , < 3.10.18 (python)
Affected: 3.11.0 , < 3.11.13 (python)
Affected: 3.12.0 , < 3.12.11 (python)
Affected: 3.13.0 , < 3.13.4 (python)
Affected: 3.14.0a1 , < 3.14.0b3 (python)
Create a notification for this product.
Credits
Chuck Woodraska Petr Viktorin Serhiy Storchaka Hugo van Kemenade Łukasz Langa Thomas Wouters Seth Larson Matt Prodani
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-4435",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-03T13:58:00.099450Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-682",
                "description": "CWE-682 Incorrect Calculation",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-03T14:34:40.228Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "tarfile"
          ],
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "versions": [
            {
              "lessThan": "3.10.18",
              "status": "affected",
              "version": "0",
              "versionType": "python"
            },
            {
              "lessThan": "3.11.13",
              "status": "affected",
              "version": "3.11.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.12.11",
              "status": "affected",
              "version": "3.12.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.13.4",
              "status": "affected",
              "version": "3.13.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.14.0b3",
              "status": "affected",
              "version": "3.14.0a1",
              "versionType": "python"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Chuck Woodraska"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Petr Viktorin"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Serhiy Storchaka"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Hugo van Kemenade"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "\u0141ukasz Langa"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Thomas Wouters"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Seth Larson"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Matt Prodani"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eWhen using a \u003c/span\u003e\u003ccode\u003eTarFile.errorlevel = 0\u003c/code\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u0026nbsp;and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of \u003c/span\u003e\u003ccode\u003eTarFile.errorlevel = 0\u003c/code\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u0026nbsp;in affected versions is that the member would still be extracted and not skipped.\u003c/span\u003e\u003cbr\u003e"
            }
          ],
          "value": "When using a TarFile.errorlevel = 0\u00a0and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0\u00a0in affected versions is that the member would still be extracted and not skipped."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-21T20:16:34.166Z",
        "orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "shortName": "PSF"
      },
      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/python/cpython/issues/135034"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/pull/135037"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951da"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Tarfile extracts filtered members when errorlevel=0",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
    "assignerShortName": "PSF",
    "cveId": "CVE-2025-4435",
    "datePublished": "2025-06-03T12:59:06.792Z",
    "dateReserved": "2025-05-08T15:05:11.874Z",
    "dateUpdated": "2026-04-21T20:16:34.166Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-4435",
      "date": "2026-05-22",
      "epss": "0.00541",
      "percentile": "0.67886"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-4435\",\"sourceIdentifier\":\"cna@python.org\",\"published\":\"2025-06-03T13:15:20.630\",\"lastModified\":\"2025-06-04T14:54:33.783\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"When using a TarFile.errorlevel = 0\u00a0and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0\u00a0in affected versions is that the member would still be extracted and not skipped.\"},{\"lang\":\"es\",\"value\":\"Al usar TarFile.errorlevel = 0 y extraer con un filtro, el comportamiento documentado es que cualquier miembro filtrado se omite y no se extrae. Sin embargo, el comportamiento real de TarFile.errorlevel = 0 en las versiones afectadas es que el miembro se extrae y no se omite.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cna@python.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-682\"}]}],\"references\":[{\"url\":\"https://github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951da\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/issues/135034\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/pull/135037\",\"source\":\"cna@python.org\"},{\"url\":\"https://mail.python.org/archives/list/security-announce@python.org/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/\",\"source\":\"cna@python.org\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-4435\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-06-03T13:58:00.099450Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-682\", \"description\": \"CWE-682 Incorrect Calculation\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-06-03T14:34:29.201Z\"}}], \"cna\": {\"title\": \"Tarfile extracts filtered members when errorlevel=0\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Chuck Woodraska\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Petr Viktorin\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Serhiy Storchaka\"}, {\"lang\": \"en\", \"type\": \"remediation reviewer\", \"value\": \"Hugo van Kemenade\"}, {\"lang\": \"en\", \"type\": \"remediation reviewer\", \"value\": \"\\u0141ukasz Langa\"}, {\"lang\": \"en\", \"type\": \"remediation reviewer\", \"value\": \"Thomas Wouters\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"Seth Larson\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Matt Prodani\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/python/cpython\", \"vendor\": \"Python Software Foundation\", \"modules\": [\"tarfile\"], \"product\": \"CPython\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"3.10.18\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.11.0\", \"lessThan\": \"3.11.13\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.12.0\", \"lessThan\": \"3.12.11\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.13.0\", \"lessThan\": \"3.13.4\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.14.0a1\", \"lessThan\": \"3.14.0b3\", \"versionType\": \"python\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/python/cpython/issues/135034\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://github.com/python/cpython/pull/135037\", \"tags\": [\"patch\"]}, {\"url\": \"https://mail.python.org/archives/list/security-announce@python.org/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951da\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"When using a TarFile.errorlevel = 0\\u00a0and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0\\u00a0in affected versions is that the member would still be extracted and not skipped.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eWhen using a \u003c/span\u003e\u003ccode\u003eTarFile.errorlevel = 0\u003c/code\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003e\u0026nbsp;and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of \u003c/span\u003e\u003ccode\u003eTarFile.errorlevel = 0\u003c/code\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003e\u0026nbsp;in affected versions is that the member would still be extracted and not skipped.\u003c/span\u003e\u003cbr\u003e\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"28c92f92-d60d-412d-b760-e73465c3df22\", \"shortName\": \"PSF\", \"dateUpdated\": \"2026-04-21T20:16:34.166Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-4435\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-21T20:16:34.166Z\", \"dateReserved\": \"2025-05-08T15:05:11.874Z\", \"assignerOrgId\": \"28c92f92-d60d-412d-b760-e73465c3df22\", \"datePublished\": \"2025-06-03T12:59:06.792Z\", \"assignerShortName\": \"PSF\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



Detection rules are retrieved from Rulezet.