Vulnerability-Lookup

GHSA-2CV4-CQWR-GWF7

Vulnerability from github – Published: 2026-10-05 23:42 – Updated: 2026-10-05 23:42

Summary

uv: Path traversal on Windows through wheel extraction

Details

Impact

In versions of uv from 0.12.7 to 0.12.18 on Windows, uv could be induced into writing a file outside of the installation prefix during wheel installation.

A malicious wheel could use this to place an executable outside of the intended environment, including in a directory already present on the user's PATH.

This vulnerability only affects Windows hosts; no other platforms are affected.

Patches

uv 0.12.18 and newer address this vulnerability. Users are encouraged to upgrade to 0.12.18.

Workarounds

There is no workaround other than upgrading to uv 0.12.18.

Severity

5.9 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "uv"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.12.7"
            },
            {
              "fixed": "0.12.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "uv"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.12.7"
            },
            {
              "fixed": "0.12.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-104843"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-05T23:42:09Z",
    "nvd_published_at": "2026-10-02T16:16:46Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nIn versions of uv from 0.12.7 to 0.12.18 on Windows, uv could be induced into writing a file outside of the installation prefix during wheel installation.\n\nA malicious wheel could use this to place an executable outside of the intended environment, including in a directory already present on the user\u0027s PATH. \n\nThis vulnerability only affects Windows hosts; no other platforms are affected.\n\n### Patches\n\nuv 0.12.18 and newer address this vulnerability. Users are encouraged to upgrade to 0.12.18.\n\n### Workarounds\n\nThere is no workaround other than upgrading to uv 0.12.18.",
  "id": "GHSA-2cv4-cqwr-gwf7",
  "modified": "2026-10-05T23:42:09Z",
  "published": "2026-10-05T23:42:09Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/astral-sh/uv/security/advisories/GHSA-2cv4-cqwr-gwf7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104843"
    },
    {
      "type": "WEB",
      "url": "https://github.com/astral-sh/uv/pull/21923"
    },
    {
      "type": "WEB",
      "url": "https://github.com/astral-sh/uv/commit/67169645278ce082638d619beefa6d062540843b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/astral-sh/uv"
    },
    {
      "type": "WEB",
      "url": "https://github.com/astral-sh/uv/releases/tag/0.12.18"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "uv: Path traversal on Windows through wheel extraction"
}

CVE-2026-104843 (GCVE-0-2026-104843)

Vulnerability from cvelistv5 – Published: 2026-10-02 15:29 – Updated: 2026-10-02 16:00

Title

uv: Path traversal on Windows through wheel extraction

Summary

uv is a Python package and project manager written in Rust. From 0.12.7 until 0.12.18, uv wheel extraction on Windows can process a malicious wheel in a way that writes a file outside the installation prefix, including an executable in a directory already present on the user's PATH. Non-Windows hosts are not affected. This issue is fixed in version 0.12.18.

Severity

5.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-02 15:57 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7580 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/astral-sh/uv/security/advisori…	x_refsource_CONFIRM
https://github.com/astral-sh/uv/pull/21923	x_refsource_MISC
https://github.com/astral-sh/uv/commit/6716964527…	x_refsource_MISC
https://github.com/astral-sh/uv/releases/tag/0.12.18	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
astral-sh	uv	Affected: >= 0.12.7, < 0.12.18

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-104843",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-02T15:57:14.347637Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-02T16:00:53.033Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "uv",
          "vendor": "astral-sh",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.12.7, \u003c 0.12.18"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "uv is a Python package and project manager written in Rust. From 0.12.7 until 0.12.18, uv wheel extraction on Windows can process a malicious wheel in a way that writes a file outside the installation prefix, including an executable in a directory already present on the user\u0027s PATH. Non-Windows hosts are not affected. This issue is fixed in version 0.12.18."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-02T15:29:15.517Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/astral-sh/uv/security/advisories/GHSA-2cv4-cqwr-gwf7",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/astral-sh/uv/security/advisories/GHSA-2cv4-cqwr-gwf7"
        },
        {
          "name": "https://github.com/astral-sh/uv/pull/21923",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/astral-sh/uv/pull/21923"
        },
        {
          "name": "https://github.com/astral-sh/uv/commit/67169645278ce082638d619beefa6d062540843b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/astral-sh/uv/commit/67169645278ce082638d619beefa6d062540843b"
        },
        {
          "name": "https://github.com/astral-sh/uv/releases/tag/0.12.18",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/astral-sh/uv/releases/tag/0.12.18"
        }
      ],
      "source": {
        "advisory": "GHSA-2cv4-cqwr-gwf7",
        "discovery": "UNKNOWN"
      },
      "title": "uv: Path traversal on Windows through wheel extraction"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-104843",
    "datePublished": "2026-10-02T15:29:15.517Z",
    "dateReserved": "2026-10-02T14:38:43.243Z",
    "dateUpdated": "2026-10-02T16:00:53.033Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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