CVE-2026-26960 (GCVE-0-2026-26960)

Vulnerability from cvelistv5 – Published: 2026-02-20 01:07 – Updated: 2026-02-20 15:35
VLAI
Title
node-tar has Arbitrary File Read/Write via Hardlink Target Escape Through Symlink Chain in Extraction
Summary
node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
isaacs node-tar Affected: < 7.5.8
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-26960",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-20T15:29:17.653825Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-20T15:35:27.586Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "node-tar",
          "vendor": "isaacs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.5.8"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "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": "2026-02-20T01:07:52.979Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx"
        },
        {
          "name": "https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384"
        },
        {
          "name": "https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e7499f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e7499f"
        }
      ],
      "source": {
        "advisory": "GHSA-83g3-92jg-28cx",
        "discovery": "UNKNOWN"
      },
      "title": "node-tar has Arbitrary File Read/Write via Hardlink Target Escape Through Symlink Chain in Extraction"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-26960",
    "datePublished": "2026-02-20T01:07:52.979Z",
    "dateReserved": "2026-02-16T22:20:28.611Z",
    "dateUpdated": "2026-02-20T15:35:27.586Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-26960",
      "date": "2026-08-10",
      "epss": "0.00288",
      "percentile": "0.20976"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-25T01:38:11.000Z",
      "cve": "CVE-2026-26960",
      "id": "msrc_CVE-2026-26960",
      "initial_release_date": "2026-02-02T00:00:00.000Z",
      "product_status:known_not_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "node-tar has Arbitrary File Read/Write via Hardlink Target Escape Through Symlink Chain in Extraction",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-26960.json",
      "version": "3"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-26960\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-02-20T02:16:53.883\",\"lastModified\":\"2026-06-17T10:26:27.197\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.\"},{\"lang\":\"es\",\"value\":\"node-tar es un Tar con todas las funciones para Node.js. Al usar las opciones predeterminadas en las versiones 7.5.7 e inferiores, un archivo controlado por el atacante puede crear un enlace duro dentro del directorio de extracci\u00f3n que apunte a un archivo fuera de la ra\u00edz de extracci\u00f3n, permitiendo la lectura y escritura arbitraria de archivos como el usuario extractor. La gravedad es alta porque la primitiva elude las protecciones de ruta y convierte la extracci\u00f3n del archivo en una primitiva de acceso directo al sistema de archivos. Este problema ha sido solucionado en la versi\u00f3n 7.5.8.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"isaacs\",\"product\":\"node-tar\",\"versions\":[{\"version\":\"\u003c 7.5.8\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-02-20T15:29:17.653825Z\",\"id\":\"CVE-2026-26960\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-22\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isaacs:tar:*:*:*:*:*:node.js:*:*\",\"versionEndExcluding\":\"7.5.8\",\"matchCriteriaId\":\"709C920B-A33B-4301-AC36-EF3065986019\"}]}]}],\"references\":[{\"url\":\"https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e7499f\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-08T16:35:22+00:00",
      "cve": "CVE-2026-26960",
      "id": "CVE-2026-26960",
      "initial_release_date": "2026-02-20T01:07:52.979000+00:00",
      "product_status:fixed": "13",
      "product_status:known_affected": "15",
      "product_status:known_not_affected": "220",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "node-tar: node-tar: Arbitrary file read/write via malicious archive hardlink creation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26960.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-03-13T13:16:43Z",
      "cve": "CVE-2026-26960",
      "id": "CVE-2026-26960",
      "initial_release_date": "2026-02-21T00:23:57Z",
      "product_status:known_affected": "8",
      "product_status:known_not_affected": "161",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-26960",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-26960.json",
      "version": "5"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-26960\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-02-20T15:29:17.653825Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-02-20T15:29:19.255Z\"}}], \"cna\": {\"title\": \"node-tar has Arbitrary File Read/Write via Hardlink Target Escape Through Symlink Chain in Extraction\", \"source\": {\"advisory\": \"GHSA-83g3-92jg-28cx\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.1, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"isaacs\", \"product\": \"node-tar\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 7.5.8\"}]}], \"references\": [{\"url\": \"https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx\", \"name\": \"https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384\", \"name\": \"https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e7499f\", \"name\": \"https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e7499f\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-22\", \"description\": \"CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-02-20T01:07:52.979Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-26960\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-02-20T15:35:27.586Z\", \"dateReserved\": \"2026-02-16T22:20:28.611Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-02-20T01:07:52.979Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

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.