Vulnerability-Lookup

UBUNTU-CVE-2026-104843 (CVE-2026-104843)

Vulnerability from osv_ubuntu – Published: 2026-10-02 16:16 – Updated: 2026-10-02 16:16 – Source website

Details

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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-104843	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-104843	REPORT
	https://github.com/astral-sh/uv/security/advisori…	REPORT
	https://github.com/astral-sh/uv/commit/6716964527…	REPORT
	https://github.com/astral-sh/uv/pull/21923	REPORT
	https://github.com/astral-sh/uv/releases/tag/0.12.18	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-uv-build",
            "binary_version": "0.9.17+ds1-6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "uv",
        "purl": "pkg:deb/ubuntu/uv@0.9.17+ds1-6?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.17+ds1-3",
        "0.9.17+ds1-4",
        "0.9.17+ds1-5",
        "0.9.17+ds1-6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "uv",
            "binary_version": "0.11.20+ds-0ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "uv-full",
        "purl": "pkg:deb/ubuntu/uv-full@0.11.20+ds-0ubuntu1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.11.20+ds-0ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-104843",
  "modified": "2026-10-02T16:16:00Z",
  "published": "2026-10-02T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-104843"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-104843"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/astral-sh/uv/security/advisories/GHSA-2cv4-cqwr-gwf7"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/astral-sh/uv/commit/67169645278ce082638d619beefa6d062540843b"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/astral-sh/uv/pull/21923"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/astral-sh/uv/releases/tag/0.12.18"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "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"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-104843"
  ]
}

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

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 7613 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

To clipboard

{
  "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.

Vulnerability timeline

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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.

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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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