Vulnerability-Lookup

OPENSUSE-SU-2026:21778-1

Vulnerability from csaf_opensuse - Published: 2026-09-06 16:46 - Updated: 2026-09-16 21:48

Summary

Security update for php-composer2

Severity

Important

Notes

Title of the patch: Security update for php-composer2

Description of the patch: This update for php-composer2 fixes the following issue: - CVE-2026-84361: Arbitrary code execution via malicious Perforce source URL (bsc#1278257).

Patchnames: openSUSE-Leap-16.0-1626

CVE-2026-84361

7.3 (High)


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

Affected products

Recommended 1 product

Product	Identifier	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:php-composer2-2.8.9-160000.5.1.noarch		—	Vendor Fix

Threats

Impact important

References

6 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1278257	self
https://www.suse.com/security/cve/CVE-2026-84361/	self
https://www.suse.com/security/cve/CVE-2026-84361	external
https://bugzilla.suse.com/1278257	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
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      "text": "important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
        "label": "WHITE",
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      }
    },
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    "notes": [
      {
        "category": "summary",
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        "title": "Title of the patch"
      },
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        "category": "description",
        "text": "This update for php-composer2 fixes the following issue:\n\n- CVE-2026-84361: Arbitrary code execution via malicious Perforce source URL (bsc#1278257).\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "openSUSE-Leap-16.0-1626",
        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
        "text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
        "title": "Terms of use"
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    "publisher": {
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      "namespace": "https://www.suse.com/"
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    "references": [
      {
        "category": "external",
        "summary": "SUSE ratings",
        "url": "https://www.suse.com/support/security/rating/"
      },
      {
        "category": "self",
        "summary": "URL of this CSAF notice",
        "url": "https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_21778-1.json"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1278257",
        "url": "https://bugzilla.suse.com/1278257"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2026-84361 page",
        "url": "https://www.suse.com/security/cve/CVE-2026-84361/"
      }
    ],
    "title": "Security update for php-composer2",
    "tracking": {
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      "generator": {
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      },
      "id": "openSUSE-SU-2026:21778-1",
      "initial_release_date": "2026-09-06T16:46:15Z",
      "revision_history": [
        {
          "date": "2026-09-06T16:46:15Z",
          "number": "1",
          "summary": "Current version"
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        {
          "date": "2026-09-16T20:47:24Z",
          "number": "2",
          "summary": "unknown changes"
        },
        {
          "date": "2026-09-16T21:48:17Z",
          "number": "3",
          "summary": "unknown changes"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "php-composer2-2.8.9-160000.5.1.noarch",
                "product": {
                  "name": "php-composer2-2.8.9-160000.5.1.noarch",
                  "product_id": "php-composer2-2.8.9-160000.5.1.noarch",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:getcomposer:composer:2.8.9:*:*:*:*:*:*:*",
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                  }
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          },
          {
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                  "name": "openSUSE Leap 16.0",
                  "product_id": "openSUSE Leap 16.0"
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              }
            ],
            "category": "product_family",
            "name": "SUSE Linux Enterprise"
          }
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    "relationships": [
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        "product_reference": "php-composer2-2.8.9-160000.5.1.noarch",
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        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Composer is a dependency Manager for the PHP language. From 1.0 until 2.2.30 and 2.10.3, a malicious dependency package from a custom Composer repository or an untrusted composer.lock file could set source.type to perforce and source.url to an rsh: or jsh: P4PORT value. When the Perforce p4 client was installed and Composer installed the package from source through composer install or composer update, including --prefer-source, Composer\\Util\\Perforce passed the address to p4 without validation, causing p4 to run a local command with the privileges of the user or CI account. Packagist.org does not permit Perforce source metadata. This issue is fixed in versions 2.2.30 and 2.10.3.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
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        ]
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-84361",
          "url": "https://www.suse.com/security/cve/CVE-2026-84361"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1278257 for CVE-2026-84361",
          "url": "https://bugzilla.suse.com/1278257"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Leap 16.0:php-composer2-2.8.9-160000.5.1.noarch"
          ]
        }
      ],
      "scores": [
        {
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            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "openSUSE Leap 16.0:php-composer2-2.8.9-160000.5.1.noarch"
          ]
        }
      ],
      "threats": [
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          "category": "impact",
          "date": "2026-09-06T16:46:15Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-84361"
    }
  ]
}

CVE-2026-84361 (GCVE-0-2026-84361)

Vulnerability from cvelistv5 – Published: 2026-09-01 20:06 – Updated: 2026-09-03 03:56

Title

Composer: Perforce source URL permits P4PORT `rsh:` command execution

Summary

Composer is a dependency Manager for the PHP language. From 1.0 until 2.2.30 and 2.10.3, a malicious dependency package from a custom Composer repository or an untrusted composer.lock file could set source.type to perforce and source.url to an rsh: or jsh: P4PORT value. When the Perforce p4 client was installed and Composer installed the package from source through composer install or composer update, including --prefer-source, Composer\Util\Perforce passed the address to p4 without validation, causing p4 to run a local command with the privileges of the user or CI account. Packagist.org does not permit Perforce source metadata. This issue is fixed in versions 2.2.30 and 2.10.3.

Severity

7.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-02 00:00 UTC

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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/0aac5…	x_refsource_MISC
https://github.com/composer/composer/commit/199ad…	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, < 2.2.30 Affected: >= 2.3.0, < 2.10.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-84361",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-02T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-03T03:56:08.149Z",
          "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 2.2.30"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.3.0, \u003c 2.10.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Composer is a dependency Manager for the PHP language. From 1.0 until 2.2.30 and 2.10.3, a malicious dependency package from a custom Composer repository or an untrusted composer.lock file could set source.type to perforce and source.url to an rsh: or jsh: P4PORT value. When the Perforce p4 client was installed and Composer installed the package from source through composer install or composer update, including --prefer-source, Composer\\Util\\Perforce passed the address to p4 without validation, causing p4 to run a local command with the privileges of the user or CI account. Packagist.org does not permit Perforce source metadata. This issue is fixed in versions 2.2.30 and 2.10.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-01T20:06:48.375Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/composer/composer/security/advisories/GHSA-rvx4-ffvw-m9q3",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/composer/composer/security/advisories/GHSA-rvx4-ffvw-m9q3"
        },
        {
          "name": "https://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220"
        },
        {
          "name": "https://github.com/composer/composer/commit/199ad81a9cc6a2a5164ad79a8da26b2e19e521af",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/commit/199ad81a9cc6a2a5164ad79a8da26b2e19e521af"
        },
        {
          "name": "https://github.com/composer/composer/releases/tag/2.10.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/releases/tag/2.10.3"
        },
        {
          "name": "https://github.com/composer/composer/releases/tag/2.2.30",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/releases/tag/2.2.30"
        }
      ],
      "source": {
        "advisory": "GHSA-rvx4-ffvw-m9q3",
        "discovery": "UNKNOWN"
      },
      "title": "Composer: Perforce source URL permits P4PORT `rsh:` command execution"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-84361",
    "datePublished": "2026-09-01T20:06:48.375Z",
    "dateReserved": "2026-09-01T16:27:58.128Z",
    "dateUpdated": "2026-09-03T03:56:08.149Z",
    "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.