CVE catalog

CVE-2026-84361

Composer is a dependency Manager for the PHP language…

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: High · CVSS 7.7CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Aug 27, 2026, 10:00:00 PM UTC
Updated: Sep 1, 2026, 9:18:47 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.50% · Oct 27, 2026

Projects and upstream resources

[composer][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiansid	composer	`2.10.3-1`	FixedDistribution-reported fixed boundary	[CVE-2026-84361]
Debianforky	composer	`2.10.3-1`	FixedDistribution-reported fixed boundary	[CVE-2026-84361]
ComposerRelease not reported	composer/composer	`2.2.30`	Fixed	[GHSA-RVX4-FFVW-M9Q3]Sep 8, 2026, 9:25:42 PM UTC

Showing 3 fix observations. All 15 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
ComposerRelease not reported	composer/composer	`2.2.30`	Fixed	[GHSA-RVX4-FFVW-M9Q3]Sep 8, 2026, 9:25:42 PM UTC
Debianbookworm	composer	Not reported	AffectedDistribution reports no fix	[CVE-2026-84361]
Debianbookworm	composer	`2.5.5-1+deb12u5`	Affected	[CVE-2026-84361]
Debianbookworm-security	composer	`2.5.5-1+deb12u2`	Affected	[CVE-2026-84361]
Debianforky	composer	`2.10.3-1`	FixedDistribution-reported fixed boundary	[CVE-2026-84361]
Debiansid	composer	`2.10.3-1`	FixedDistribution-reported fixed boundary	[CVE-2026-84361]
Debiantrixie	composer	Not reported	AffectedDistribution reports no fix	[CVE-2026-84361]
Debiantrixie	composer	`2.8.8-1+deb13u3`	Affected	[CVE-2026-84361]
Opensuseleap 16.0	php-composer2	`2.8.9-160000.5.1`	UnknownSource applicability is not established	[OPENSUSE-SU-2026:21778-1]Sep 9, 2026, 6:23:15 PM UTC
Opensusetumbleweed	php-composer2	`2.10.3-2.1`	UnknownSource applicability is not established	[OPENSUSE-SU-2026:11689-1]Sep 5, 2026, 9:45:04 AM UTC
Suselinux enterprise module for web and scripting 15 sp7	php-composer2	`2.6.4-150600.3.18.1`	UnknownSource applicability is not established	[SUSE-SU-2026:4059-1]Sep 13, 2026, 6:23:18 PM UTC
Suselinux enterprise server 15 sp6-ltss	php-composer2	`2.6.4-150600.3.18.1`	UnknownSource applicability is not established	[SUSE-SU-2026:4059-1]Sep 13, 2026, 6:23:18 PM UTC
Suselinux enterprise server 16.0	php-composer2	`2.8.9-160000.5.1`	UnknownSource applicability is not established	[SUSE-SU-2026:23635-1]Sep 29, 2026, 6:23:10 PM UTC
Suselinux enterprise server for sap applications 15 sp6	php-composer2	`2.6.4-150600.3.18.1`	UnknownSource applicability is not established	[SUSE-SU-2026:4059-1]Sep 13, 2026, 6:23:18 PM UTC
Suselinux enterprise server for sap applications 16.0	php-composer2	`2.8.9-160000.5.1`	UnknownSource applicability is not established	[SUSE-SU-2026:23635-1]Sep 29, 2026, 6:23:10 PM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "composer",
      "status": "fixed",
      "release": "sid",
      "version": "2.10.3-1"
    },
    {
      "name": "composer",
      "status": "fixed",
      "release": "forky",
      "version": "2.10.3-1"
    },
    {
      "name": "composer",
      "status": "vulnerable",
      "release": "trixie",
      "version": "2.8.8-1+deb13u3"
    },
    {
      "name": "composer",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "2.5.5-1+deb12u5"
    },
    {
      "name": "composer",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "2.5.5-1+deb12u2"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "composer",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "2.10.3-1"
    },
    {
      "bug": null,
      "name": "composer",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "2.10.3-1"
    },
    {
      "bug": null,
      "name": "composer",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "composer",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "composer/composer",
      "ecosystem": "composer",
      "provider_url": "https://github.com/advisories/GHSA-rvx4-ffvw-m9q3",
      "fixed_version": "2.2.30",
      "provider_source": "github",
      "provider_record_id": "GHSA-RVX4-FFVW-M9Q3",
      "provider_updated_at": "2026-09-08T21:25:42Z"
    },
    {
      "name": "php-composer2",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.8.9-160000.5.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/SUSE-SU-2026:23635-1",
      "fixed_version": "2.8.9-160000.5.1",
      "provider_source": "pypi",
      "provider_record_id": "SUSE-SU-2026:23635-1",
      "provider_updated_at": "2026-09-29T18:23:10.291779788Z",
      "applicability_unknown": true
    },
    {
      "name": "php-composer2",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.8.9-160000.5.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server for sap applications 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/SUSE-SU-2026:23635-1",
      "fixed_version": "2.8.9-160000.5.1",
      "provider_source": "pypi",
      "provider_record_id": "SUSE-SU-2026:23635-1",
      "provider_updated_at": "2026-09-29T18:23:10.291779788Z",
      "applicability_unknown": true
    },
    {
      "name": "php-composer2",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.4-150600.3.18.1"
            }
          ]
        }
      ],
      "release": "linux enterprise module for web and scripting 15 sp7",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/SUSE-SU-2026:4059-1",
      "fixed_version": "2.6.4-150600.3.18.1",
      "provider_source": "pypi",
      "provider_record_id": "SUSE-SU-2026:4059-1",
      "provider_updated_at": "2026-09-13T18:23:18.959956081Z",
      "applicability_unknown": true
    },
    {
      "name": "php-composer2",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.4-150600.3.18.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server 15 sp6-ltss",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/SUSE-SU-2026:4059-1",
      "fixed_version": "2.6.4-150600.3.18.1",
      "provider_source": "pypi",
      "provider_record_id": "SUSE-SU-2026:4059-1",
      "provider_updated_at": "2026-09-13T18:23:18.959956081Z",
      "applicability_unknown": true
    },
    {
      "name": "php-composer2",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.4-150600.3.18.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server for sap applications 15 sp6",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/SUSE-SU-2026:4059-1",
      "fixed_version": "2.6.4-150600.3.18.1",
      "provider_source": "pypi",
      "provider_record_id": "SUSE-SU-2026:4059-1",
      "provider_updated_at": "2026-09-13T18:23:18.959956081Z",
      "applicability_unknown": true
    },
    {
      "name": "php-composer2",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.8.9-160000.5.1"
            }
          ]
        }
      ],
      "release": "leap 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/openSUSE-SU-2026:21778-1",
      "fixed_version": "2.8.9-160000.5.1",
      "provider_source": "pypi",
      "provider_record_id": "OPENSUSE-SU-2026:21778-1",
      "provider_updated_at": "2026-09-09T18:23:15.375632671Z",
      "applicability_unknown": true
    },
    {
      "name": "php-composer2",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.10.3-2.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/openSUSE-SU-2026:11689-1",
      "fixed_version": "2.10.3-2.1",
      "provider_source": "pypi",
      "provider_record_id": "OPENSUSE-SU-2026:11689-1",
      "provider_updated_at": "2026-09-05T09:45:04.472292170Z",
      "applicability_unknown": true
    }
  ]
}

Publisher notes

[trixie] composer: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[composer]Unknown
Details (4)
- 2.5.5-1+deb12u5 · all · bookworm
  Affected
  nvd · composer · debian · bookworm; nvd · composer · debian · 12
- 2.5.5-1+deb12u5 · all · bookworm
  Affected
  nvd · composer · debian · bookworm; nvd · composer · debian · 12
- 2.5.5-1+deb12u2 · all · bookworm-security
  Affected
  nvd · composer · debian · bookworm; nvd · composer · debian · 12
- 2.5.5-1+deb12u2 · all · bookworm-security
  Affected
  nvd · composer · debian · bookworm; nvd · composer · debian · 12

[Debian 13 (Trixie)]

[composer]Unknown
Details (2)
- 2.8.8-1+deb13u3 · all · trixie
  Affected
  nvd · composer · debian · 13
- 2.8.8-1+deb13u3 · all · trixie
  Affected
  nvd · composer · debian · 13

[openSUSE Tumbleweed]

[php-composer2]Unknown
Source package: [php-composer2]
Details (1)
- 2.10.3-1.1 · noarch · tumbleweed
  Affected · Fixed: 2.10.3-2.1
  nvd · php-composer2 · opensuse · tumbleweed

Observed: Oct 23, 2026, 9:35:03 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]