Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-07-14 08:41

Modified

2026-07-27 06:08

Summary

Composer: Arbitrary file write outside vendor via malicious transitive package name

Details

Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a maliciously crafted package from an untrusted repository other than Packagist.org or Private Packagist can cause Composer to write attacker-controlled files outside the vendor directory and outside the project during install or update by using an invalid package name that is not correctly validated before dependency-resolution results are written or installed. This issue is fixed in versions 2.2.29 and 2.10.2.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "composer",
        "purl": "pkg:bitnami/composer"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.0.0"
            },
            {
              "fixed": "2.2.29"
            },
            {
              "introduced": "2.3.0"
            },
            {
              "fixed": "2.10.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59948"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:getcomposer:composer:*:*:*:*:*:*:*:*",
      "cpe:2.3:a:getcomposer:composer:*:*:*:*:*:php:*:*"
    ],
    "severity": "High"
  },
  "details": "Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a maliciously crafted package from an untrusted repository other than Packagist.org or Private Packagist can cause Composer to write attacker-controlled files outside the vendor directory and outside the project during install or update by using an invalid package name that is not correctly validated before dependency-resolution results are written or installed. This issue is fixed in versions 2.2.29 and 2.10.2.",
  "id": "BIT-composer-2026-59948",
  "modified": "2026-07-27T06:08:49.409Z",
  "published": "2026-07-14T08:41:01.133Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/composer/composer/releases/tag/2.10.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/composer/composer/releases/tag/2.2.29"
    },
    {
      "type": "WEB",
      "url": "https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59948"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Composer: Arbitrary file write outside vendor via malicious transitive package name"
}

CVE-2026-59948 (GCVE-0-2026-59948)

Vulnerability from cvelistv5 – Published: 2026-07-08 19:33 – Updated: 2026-07-09 14:32

Title

Composer: Arbitrary file write outside vendor via malicious transitive package name

Summary

Severity

7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-09 14:32 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-787 - Out-of-bounds Write

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/composer/composer/security/adv…	x_refsource_CONFIRM
https://github.com/composer/composer/commit/502c6…	x_refsource_MISC
https://github.com/composer/composer/commit/c50b1…	x_refsource_MISC
https://github.com/composer/composer/releases/tag…	x_refsource_MISC
https://github.com/composer/composer/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
composer	composer	Affected: >= 1.0, < 2.2.29 Affected: >= 2.3.0, < 2.10.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59948",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T14:32:00.579490Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-09T14:32:07.719Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "composer",
          "vendor": "composer",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0, \u003c 2.2.29"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.3.0, \u003c 2.10.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a maliciously crafted package from an untrusted repository other than Packagist.org or Private Packagist can cause Composer to write attacker-controlled files outside the vendor directory and outside the project during install or update by using an invalid package name that is not correctly validated before dependency-resolution results are written or installed. This issue is fixed in versions 2.2.29 and 2.10.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "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"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-08T19:33:48.414Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9"
        },
        {
          "name": "https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0"
        },
        {
          "name": "https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1"
        },
        {
          "name": "https://github.com/composer/composer/releases/tag/2.10.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/releases/tag/2.10.2"
        },
        {
          "name": "https://github.com/composer/composer/releases/tag/2.2.29",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/releases/tag/2.2.29"
        }
      ],
      "source": {
        "advisory": "GHSA-499r-g7pc-vmp9",
        "discovery": "UNKNOWN"
      },
      "title": "Composer: Arbitrary file write outside vendor via malicious transitive package name"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59948",
    "datePublished": "2026-07-08T19:33:48.414Z",
    "dateReserved": "2026-07-07T18:49:15.607Z",
    "dateUpdated": "2026-07-09T14:32:07.719Z",
    "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.

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.