Vulnerability-Lookup

ubuntu-cve-2026-44029

Vulnerability from osv_ubuntu

Published

2026-05-05 01:16

Modified

2026-05-20 15:28

Summary

Details

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

Severity

5.3 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-44029	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-44029	REPORT
	https://www.openwall.com/lists/oss-security/2026/…	REPORT
	https://github.com/NixOS/nix/security/advisories/…	REPORT
	https://discourse.nixos.org/t/security-advisory-l…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "nix-bin",
            "binary_version": "2.6.0+dfsg-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "nix-setup-systemd",
            "binary_version": "2.6.0+dfsg-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "nix",
        "purl": "pkg:deb/ubuntu/nix@2.6.0+dfsg-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.10+dfsg1-1",
        "2.3.10+dfsg1-1build1",
        "2.6.0+dfsg-2",
        "2.6.0+dfsg-3",
        "2.6.0+dfsg-3ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "nix-bin",
            "binary_version": "2.18.1+dfsg-1ubuntu5+esm2"
          },
          {
            "binary_name": "nix-setup-systemd",
            "binary_version": "2.18.1+dfsg-1ubuntu5+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "nix",
        "purl": "pkg:deb/ubuntu/nix@2.18.1+dfsg-1ubuntu5+esm2?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.16.1+dfsg-3ubuntu1",
        "2.18.1+dfsg-1ubuntu1",
        "2.18.1+dfsg-1ubuntu2",
        "2.18.1+dfsg-1ubuntu4",
        "2.18.1+dfsg-1ubuntu5",
        "2.18.1+dfsg-1ubuntu5+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "nix-bin",
            "binary_version": "2.26.3+dfsg-1ubuntu4"
          },
          {
            "binary_name": "nix-setup-systemd",
            "binary_version": "2.26.3+dfsg-1ubuntu4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "nix",
        "purl": "pkg:deb/ubuntu/nix@2.26.3+dfsg-1ubuntu4?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.24.9+dfsg-2ubuntu2",
        "2.26.3+dfsg-1ubuntu1",
        "2.26.3+dfsg-1ubuntu2",
        "2.26.3+dfsg-1ubuntu4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "nix-bin",
            "binary_version": "2.34.3+dfsg-1"
          },
          {
            "binary_name": "nix-setup-systemd",
            "binary_version": "2.34.3+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "nix",
        "purl": "pkg:deb/ubuntu/nix@2.34.3+dfsg-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.26.3+dfsg-1ubuntu4",
        "2.26.3+dfsg-1ubuntu5",
        "2.32.5+dfsg-1ubuntu3",
        "2.32.5+dfsg-2ubuntu1",
        "2.34.3+dfsg-1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via \"nix-prefetch-url --unpack\" or \"nix store prefetch-file --unpack\" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);",
  "id": "UBUNTU-CVE-2026-44029",
  "modified": "2026-05-20T15:28:57Z",
  "published": "2026-05-05T01:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44029"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-44029"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2026/05/04/33"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/NixOS/nix/security/advisories/GHSA-gr92-w2r5-qw5p"
    },
    {
      "type": "REPORT",
      "url": "https://discourse.nixos.org/t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-44029"
  ]
}

CVE-2026-44029 (GCVE-0-2026-44029)

Vulnerability from cvelistv5 – Published: 2026-05-05 00:51 – Updated: 2026-05-05 12:43

Summary

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-36 - Absolute Path Traversal

Assigner

mitre

References

3 references

URL	Tags
https://discourse.nixos.org/t/security-advisory-l…
https://www.openwall.com/lists/oss-security/2026/…
https://github.com/NixOS/nix/security/advisories/…

Impacted products

1 product

Vendor	Product	Version
NixOS	Nix	Affected: 2.24.7 , < 2.28.7 (semver) Affected: 2.29.0 , < 2.29.4 (semver) Affected: 2.30.0 , < 2.30.5 (semver) Affected: 2.31.0 , < 2.31.5 (semver) Affected: 2.32.0 , < 2.32.8 (semver) Affected: 2.33.0 , < 2.33.6 (semver) Affected: 2.34.0 , < 2.34.7 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44029",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-05T12:43:20.590037Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-05T12:43:28.239Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Nix",
          "vendor": "NixOS",
          "versions": [
            {
              "lessThan": "2.28.7",
              "status": "affected",
              "version": "2.24.7",
              "versionType": "semver"
            },
            {
              "lessThan": "2.29.4",
              "status": "affected",
              "version": "2.29.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.30.5",
              "status": "affected",
              "version": "2.30.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.31.5",
              "status": "affected",
              "version": "2.31.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.32.8",
              "status": "affected",
              "version": "2.32.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.33.6",
              "status": "affected",
              "version": "2.33.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.34.7",
              "status": "affected",
              "version": "2.34.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.28.7",
                  "versionStartIncluding": "2.24.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.29.4",
                  "versionStartIncluding": "2.29.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.30.5",
                  "versionStartIncluding": "2.30.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.31.5",
                  "versionStartIncluding": "2.31.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.32.8",
                  "versionStartIncluding": "2.32.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.33.6",
                  "versionStartIncluding": "2.33.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.34.7",
                  "versionStartIncluding": "2.34.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via \"nix-prefetch-url --unpack\" or \"nix store prefetch-file --unpack\" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-36",
              "description": "CWE-36 Absolute Path Traversal",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-05T00:58:14.984Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://discourse.nixos.org/t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407"
        },
        {
          "url": "https://www.openwall.com/lists/oss-security/2026/05/04/33"
        },
        {
          "url": "https://github.com/NixOS/nix/security/advisories/GHSA-gr92-w2r5-qw5p"
        }
      ],
      "x_generator": {
        "engine": "CVE-Request-form 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-44029",
    "datePublished": "2026-05-05T00:51:05.533Z",
    "dateReserved": "2026-05-05T00:51:05.139Z",
    "dateUpdated": "2026-05-05T12:43:28.239Z",
    "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.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2026-44029

Vulnerability from osv_ubuntu

CVE-2026-44029 (GCVE-0-2026-44029)

Tags

Sightings

Nomenclature