Vulnerability-Lookup

PYSEC-2026-4011

Vulnerability from pysec - Published: 2026-09-18 01:41 - Updated: 2026-09-30 16:13

Details

download_wheel() runs pip download and hands the result straight to the seeder, with nothing checking the bytes it gets back. The embedded pip and setuptools wheels carry a BUNDLE_SHA256 that virtualenv checks on every load, but a wheel fetched over the network for the periodic-update feature or the --download flag had no equivalent verification.

A compromised index, a stale mirror, or a MITM'd download (when TLS is intercepted, e.g. via a misconfigured or malicious CA) could substitute a different wheel under the same distribution/version/filename, and virtualenv would cache and seed it into every environment created afterward with no warning.

Fixed in 21.7.12 by computing the downloaded wheel's sha256 and comparing it against the digest PyPI's public JSON API reports for that exact release, independent of which index actually served the file. The check is skipped, not treated as failure, when a custom index (PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, PIP_INDEX) is configured, since a private index can legitimately serve a different, intentionally rebuilt wheel.

Impacted products

Name	purl
virtualenv	pkg:pypi/virtualenv

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "virtualenv",
        "purl": "pkg:pypi/virtualenv"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "21.7.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.8",
        "0.8.1",
        "0.8.2",
        "0.8.3",
        "0.8.4",
        "0.9",
        "0.9.1",
        "0.9.2",
        "1.0",
        "1.1",
        "1.10",
        "1.10.1",
        "1.11",
        "1.11.1",
        "1.11.2",
        "1.11.3",
        "1.11.4",
        "1.11.5",
        "1.11.6",
        "1.2",
        "1.3",
        "1.3.1",
        "1.3.2",
        "1.3.3",
        "1.3.4",
        "1.4",
        "1.4.1",
        "1.4.2",
        "1.4.3",
        "1.4.4",
        "1.4.5",
        "1.4.6",
        "1.4.7",
        "1.4.8",
        "1.4.9",
        "1.4rc1",
        "1.5",
        "1.5.1",
        "1.5.2",
        "1.6",
        "1.6.1",
        "1.6.2",
        "1.6.3",
        "1.6.4",
        "1.7",
        "1.7.1",
        "1.7.1.1",
        "1.7.1.2",
        "1.7.2",
        "1.8",
        "1.8.1",
        "1.8.2",
        "1.8.3",
        "1.8.4",
        "1.9",
        "1.9.1",
        "12.0",
        "12.0.1",
        "12.0.2",
        "12.0.4",
        "12.0.5",
        "12.0.6",
        "12.0.7",
        "12.1.0",
        "12.1.1",
        "13.0.0",
        "13.0.1",
        "13.0.2",
        "13.0.3",
        "13.1.0",
        "13.1.1",
        "13.1.2",
        "14.0.0",
        "14.0.1",
        "14.0.2",
        "14.0.3",
        "14.0.4",
        "14.0.5",
        "14.0.6",
        "15.0.0",
        "15.0.1",
        "15.0.2",
        "15.0.3",
        "15.1.0",
        "15.2.0",
        "16.0.0",
        "16.1.0",
        "16.2.0",
        "16.3.0",
        "16.3.1.dev0",
        "16.4.0",
        "16.4.1",
        "16.4.3",
        "16.4.4.dev0",
        "16.5.0",
        "16.6.0",
        "16.6.1",
        "16.6.2",
        "16.7.0",
        "16.7.1",
        "16.7.10",
        "16.7.11",
        "16.7.12",
        "16.7.2",
        "16.7.3",
        "16.7.4",
        "16.7.5",
        "16.7.6",
        "16.7.7",
        "16.7.8",
        "16.7.9",
        "20.0.0",
        "20.0.0b1",
        "20.0.0b2",
        "20.0.1",
        "20.0.10",
        "20.0.11",
        "20.0.12",
        "20.0.13",
        "20.0.14",
        "20.0.15",
        "20.0.16",
        "20.0.17",
        "20.0.18",
        "20.0.19",
        "20.0.2",
        "20.0.20",
        "20.0.21",
        "20.0.22",
        "20.0.23",
        "20.0.24",
        "20.0.25",
        "20.0.26",
        "20.0.27",
        "20.0.28",
        "20.0.29",
        "20.0.3",
        "20.0.30",
        "20.0.31",
        "20.0.32",
        "20.0.33",
        "20.0.34",
        "20.0.35",
        "20.0.4",
        "20.0.5",
        "20.0.6",
        "20.0.7",
        "20.0.8",
        "20.0.9",
        "20.1.0",
        "20.10.0",
        "20.11.0",
        "20.11.1",
        "20.11.2",
        "20.12.0",
        "20.12.1",
        "20.13.0",
        "20.13.1",
        "20.13.2",
        "20.13.3",
        "20.13.4",
        "20.14.0",
        "20.14.1",
        "20.15.0",
        "20.15.1",
        "20.16.0",
        "20.16.1",
        "20.16.2",
        "20.16.3",
        "20.16.4",
        "20.16.5",
        "20.16.6",
        "20.16.7",
        "20.17.0",
        "20.17.1",
        "20.18.0",
        "20.19.0",
        "20.2.0",
        "20.2.1",
        "20.2.2",
        "20.20.0",
        "20.21.0",
        "20.21.1",
        "20.22.0",
        "20.23.0",
        "20.23.1",
        "20.24.0",
        "20.24.1",
        "20.24.2",
        "20.24.3",
        "20.24.4",
        "20.24.5",
        "20.24.6",
        "20.24.7",
        "20.25.0",
        "20.25.1",
        "20.25.2",
        "20.25.3",
        "20.26.0",
        "20.26.1",
        "20.26.2",
        "20.26.3",
        "20.26.4",
        "20.26.5",
        "20.26.6",
        "20.27.0",
        "20.27.1",
        "20.28.0",
        "20.28.1",
        "20.29.0",
        "20.29.1",
        "20.29.2",
        "20.29.3",
        "20.3.0",
        "20.3.1",
        "20.30.0",
        "20.31.0",
        "20.31.1",
        "20.31.2",
        "20.32.0",
        "20.33.0",
        "20.33.1",
        "20.34.0",
        "20.35.0",
        "20.35.1",
        "20.35.2",
        "20.35.3",
        "20.35.4",
        "20.36.0",
        "20.36.1",
        "20.38.0",
        "20.39.0",
        "20.39.1",
        "20.4.0",
        "20.4.1",
        "20.4.2",
        "20.4.3",
        "20.4.4",
        "20.4.5",
        "20.4.6",
        "20.4.7",
        "20.5.0",
        "20.6.0",
        "20.7.0",
        "20.7.1",
        "20.7.2",
        "20.8.0",
        "20.8.1",
        "20.9.0",
        "21.0.0",
        "21.1.0",
        "21.2.0",
        "21.2.1",
        "21.2.2",
        "21.2.3",
        "21.2.4",
        "21.3.0",
        "21.3.1",
        "21.3.2",
        "21.3.3",
        "21.4.0",
        "21.4.1",
        "21.4.2",
        "21.4.3",
        "21.5.0",
        "21.5.1",
        "21.5.2",
        "21.6.0",
        "21.6.1",
        "21.7.0",
        "21.7.1",
        "21.7.10",
        "21.7.11",
        "21.7.2",
        "21.7.3",
        "21.7.4",
        "21.7.5",
        "21.7.6",
        "21.7.7",
        "21.7.8",
        "21.7.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-102930",
    "GHSA-94p9-xgh2-xp45"
  ],
  "credits": [
    {
      "name": "Bern\u00e1t G\u00e1bor",
      "type": "FINDER"
    }
  ],
  "details": "`download_wheel()` runs `pip download` and hands the result straight to the\nseeder, with nothing checking the bytes it gets back. The embedded pip and\nsetuptools wheels carry a `BUNDLE_SHA256` that virtualenv checks on every load,\nbut a wheel fetched over the network for the periodic-update feature or the\n`--download` flag had no equivalent verification.\n\nA compromised index, a stale mirror, or a MITM\u0027d download (when TLS is\nintercepted, e.g. via a misconfigured or malicious CA) could substitute a\ndifferent wheel under the same distribution/version/filename, and virtualenv\nwould cache and seed it into every environment created afterward with no\nwarning.\n\nFixed in 21.7.12 by computing the downloaded wheel\u0027s sha256 and comparing it\nagainst the digest PyPI\u0027s public JSON API reports for that exact release,\nindependent of which index actually served the file. The check is skipped, not\ntreated as failure, when a custom index (`PIP_INDEX_URL`,\n`PIP_EXTRA_INDEX_URL`, `PIP_INDEX`) is configured, since a private index can\nlegitimately serve a different, intentionally rebuilt wheel.\n",
  "id": "PYSEC-2026-4011",
  "modified": "2026-09-30T16:13:20.376860Z",
  "published": "2026-09-18T01:41:45Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/pull/3251"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/releases/tag/21.7.12"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pypa/virtualenv"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/virtualenv"
    }
  ],
  "summary": "Downloaded seed wheels (pip/setuptools) are not integrity-checked before use"
}

BREW-CLOUDISCOVERY-CVE-2… (PYSEC-2026-4011)

Vulnerability from osv_homebrew – Published: 2026-09-30 21:05 – Updated: 2026-09-30 21:05 – Source website

Summary

Downloaded seed wheels (pip/setuptools) are not integrity-checked before use

Details

References

URL

Type

	https://github.com/pypa/virtualenv/security/advis…	WEB
	https://github.com/pypa/virtualenv/pull/3251	WEB
	https://github.com/pypa/virtualenv/commit/a01ed3e…	FIX
	https://github.com/pypa/virtualenv/releases/tag/21.7.12	WEB
	https://github.com/pypa/virtualenv	PACKAGE
	https://pypi.org/project/virtualenv	PACKAGE

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": null,
        "range_state": "affected",
        "resource": "virtualenv",
        "resource_purl": "pkg:pypi/virtualenv@20.31.2",
        "upstream_fixed_in": "21.7.12"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "cloudiscovery",
        "purl": "pkg:brew/cloudiscovery"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.4.4_4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/virtualenv@20.31.2",
        "name": "virtualenv",
        "resource": "virtualenv",
        "strategy": "registry",
        "subject_version": "20.31.2"
      }
    ]
  },
  "details": "`download_wheel()` runs `pip download` and hands the result straight to the\nseeder, with nothing checking the bytes it gets back. The embedded pip and\nsetuptools wheels carry a `BUNDLE_SHA256` that virtualenv checks on every load,\nbut a wheel fetched over the network for the periodic-update feature or the\n`--download` flag had no equivalent verification.\n\nA compromised index, a stale mirror, or a MITM\u0027d download (when TLS is\nintercepted, e.g. via a misconfigured or malicious CA) could substitute a\ndifferent wheel under the same distribution/version/filename, and virtualenv\nwould cache and seed it into every environment created afterward with no\nwarning.\n\nFixed in 21.7.12 by computing the downloaded wheel\u0027s sha256 and comparing it\nagainst the digest PyPI\u0027s public JSON API reports for that exact release,\nindependent of which index actually served the file. The check is skipped, not\ntreated as failure, when a custom index (`PIP_INDEX_URL`,\n`PIP_EXTRA_INDEX_URL`, `PIP_INDEX`) is configured, since a private index can\nlegitimately serve a different, intentionally rebuilt wheel.\n",
  "id": "BREW-cloudiscovery-CVE-2026-102930",
  "modified": "2026-09-30T21:05:15Z",
  "published": "2026-09-30T21:05:15Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/pull/3251"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/releases/tag/21.7.12"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pypa/virtualenv"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/virtualenv"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "Downloaded seed wheels (pip/setuptools) are not integrity-checked before use",
  "upstream": [
    "PYSEC-2026-4011",
    "CVE-2026-102930",
    "GHSA-94p9-xgh2-xp45"
  ]
}

CVE-2026-102930 (GCVE-0-2026-102930)

Vulnerability from cvelistv5 – Published: 2026-09-29 20:53 – Updated: 2026-09-30 14:02

Title

virtualenv: Downloaded seed wheels (pip/setuptools) are not integrity-checked before use

Summary

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, download_wheel() accepts pip and setuptools seed wheels fetched for periodic updates or the --download option without checking their bytes against an authoritative digest equivalent to the embedded wheels' BUNDLE_SHA256 verification. A compromised index, stale mirror, or intercepted TLS connection can substitute a different wheel under the requested distribution, version, and filename, after which virtualenv caches and seeds the attacker-controlled wheel into subsequently created environments. The verification applies to the default PyPI path and is intentionally skipped when PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, or PIP_INDEX configures a custom index that may legitimately publish rebuilt wheels. This issue is fixed in version 21.7.12.

Severity

7.7 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:02 UTC

CWE

CWE-494 - Download of Code Without Integrity Check

Assigner

GitHub_M mitre root Scorecard

References

3 references

URL	Tags
https://github.com/pypa/virtualenv/security/advis…	x_refsource_CONFIRM
https://github.com/pypa/virtualenv/pull/3251	x_refsource_MISC
https://github.com/pypa/virtualenv/commit/a01ed3e…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
pypa	virtualenv	Affected: < 21.7.12

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-102930",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-30T14:02:14.766019Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-30T14:02:24.390Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "virtualenv",
          "vendor": "pypa",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 21.7.12"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, download_wheel() accepts pip and setuptools seed wheels fetched for periodic updates or the --download option without checking their bytes against an authoritative digest equivalent to the embedded wheels\u0027 BUNDLE_SHA256 verification. A compromised index, stale mirror, or intercepted TLS connection can substitute a different wheel under the requested distribution, version, and filename, after which virtualenv caches and seeds the attacker-controlled wheel into subsequently created environments. The verification applies to the default PyPI path and is intentionally skipped when PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, or PIP_INDEX configures a custom index that may legitimately publish rebuilt wheels. This issue is fixed in version 21.7.12."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-494",
              "description": "CWE-494: Download of Code Without Integrity Check",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-29T20:53:36.018Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45"
        },
        {
          "name": "https://github.com/pypa/virtualenv/pull/3251",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pypa/virtualenv/pull/3251"
        },
        {
          "name": "https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d"
        }
      ],
      "source": {
        "advisory": "GHSA-94p9-xgh2-xp45",
        "discovery": "UNKNOWN"
      },
      "title": "virtualenv: Downloaded seed wheels (pip/setuptools) are not integrity-checked before use"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-102930",
    "datePublished": "2026-09-29T20:53:36.018Z",
    "dateReserved": "2026-09-29T20:24:43.340Z",
    "dateUpdated": "2026-09-30T14:02:24.390Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-94P9-XGH2-XP45

Vulnerability from github – Published: 2026-09-30 23:54 – Updated: 2026-09-30 23:54

Summary

virtualenv: Downloaded seed wheels (pip/setuptools) are not integrity-checked before use

Details

Fixed by computing the downloaded wheel's sha256 and comparing it against the digest PyPI's public JSON API reports for that exact release, independent of which index actually served the file. The check is skipped, not treated as failure, when a custom index (PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, PIP_INDEX) is configured, since a private index can legitimately serve a different, intentionally rebuilt wheel. Fix: https://github.com/pypa/virtualenv/pull/3251

Severity

7.7 (High)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 21.7.11"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "virtualenv"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "21.7.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-102930"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-494"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-30T23:54:13Z",
    "nvd_published_at": "2026-09-29T21:17:18Z",
    "severity": "HIGH"
  },
  "details": "`download_wheel()` runs `pip download` and hands the result straight to the seeder, with nothing checking the bytes it gets back. The embedded pip and setuptools wheels carry a `BUNDLE_SHA256` that virtualenv checks on every load, but a wheel fetched over the network for the periodic-update feature or the `--download` flag had no equivalent verification.\n\nA compromised index, a stale mirror, or a MITM\u0027d download (when TLS is intercepted, e.g. via a misconfigured or malicious CA) could substitute a different wheel under the same distribution/version/filename, and virtualenv would cache and seed it into every environment created afterward with no warning.\n\nFixed by computing the downloaded wheel\u0027s sha256 and comparing it against the digest PyPI\u0027s public JSON API reports for that exact release, independent of which index actually served the file. The check is skipped, not treated as failure, when a custom index (`PIP_INDEX_URL`, `PIP_EXTRA_INDEX_URL`, `PIP_INDEX`) is configured, since a private index can legitimately serve a different, intentionally rebuilt wheel. Fix: https://github.com/pypa/virtualenv/pull/3251",
  "id": "GHSA-94p9-xgh2-xp45",
  "modified": "2026-09-30T23:54:13Z",
  "published": "2026-09-30T23:54:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102930"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/pull/3251"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/virtualenv/PYSEC-2026-4011.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pypa/virtualenv"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/releases/tag/21.7.12"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/virtualenv"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "virtualenv: Downloaded seed wheels (pip/setuptools) are not integrity-checked before use"
}

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

PYSEC-2026-4011

BREW-CLOUDISCOVERY-CVE-2… (PYSEC-2026-4011)

CVE-2026-102930 (GCVE-0-2026-102930)

GHSA-94P9-XGH2-XP45

Tags

Sightings

Nomenclature

Related by attack behaviour