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

Vulnerability from cvelistv5 – Published: 2026-09-29 20:53 – Updated: 2026-09-29 20:53
VLAI
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
CWE
  • CWE-494 - Download of Code Without Integrity Check
Assigner
References
Impacted products
Vendor Product Version CPE status
pypa virtualenv Affected: < 21.7.12
guessed Create a notification for this product.
Show details on NVD website
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        }
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          "tags": [
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          "url": "https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d"
        }
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      "source": {
        "advisory": "GHSA-94p9-xgh2-xp45",
        "discovery": "UNKNOWN"
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      "title": "virtualenv: Downloaded seed wheels (pip/setuptools) are not integrity-checked before use"
    }
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    "datePublished": "2026-09-29T20:53:36.018Z",
    "dateReserved": "2026-09-29T20:24:43.340Z",
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    "state": "PUBLISHED"
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          }
        ],
        "id": "CVE-2026-102930",
        "lastModified": "2026-09-29T21:17:18.740",
        "metrics": {
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                "Recovery": "NOT_DEFINED",
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                "exploitMaturity": "NOT_DEFINED",
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                "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": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "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/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",
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        "vulnStatus": "Received",
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    "redhat_vex": {
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      "current_release_date": "2026-09-29T23:27:01+00:00",
      "cve": "CVE-2026-102930",
      "id": "CVE-2026-102930",
      "initial_release_date": "2026-09-29T20:53:36.018000+00:00",
      "product_status:known_affected": "43",
      "product_status:known_not_affected": "5",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "virtualenv: virtualenv: Arbitrary code execution via unverified downloaded seed wheels",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102930.json",
      "version": "3"
    }
  }
}



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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

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Nomenclature

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.



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.