CVE-2026-84361

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-84361", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-01T16:27:58.128Z", "datePublished": "2026-09-01T20:06:48.375Z", "dateUpdated": "2026-09-03T03:56:08.149Z"}, "containers": {"cna": {"title": "Composer: Perforce source URL permits P4PORT `rsh:` command execution", "problemTypes": [{"descriptions": [{"cweId": "CWE-78", "lang": "en", "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "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"}}], "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"}], "affected": [{"vendor": "composer", "product": "composer", "versions": [{"version": ">= 1.0, < 2.2.30", "status": "affected"}, {"version": ">= 2.3.0, < 2.10.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-01T20:06:48.375Z"}, "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."}], "source": {"advisory": "GHSA-rvx4-ffvw-m9q3", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-02T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-84361"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-03T03:56:08.149Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-84361", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-02T19:13:25.977364Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T19:13:30.347Z"}}], "cna": {"title": "Composer: Perforce source URL permits P4PORT `rsh:` command execution", "source": {"advisory": "GHSA-rvx4-ffvw-m9q3", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 7.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "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", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH"}}], "affected": [{"vendor": "composer", "product": "composer", "versions": [{"status": "affected", "version": ">= 1.0, < 2.2.30"}, {"status": "affected", "version": ">= 2.3.0, < 2.10.3"}]}], "references": [{"url": "https://github.com/composer/composer/security/advisories/GHSA-rvx4-ffvw-m9q3", "name": "https://github.com/composer/composer/security/advisories/GHSA-rvx4-ffvw-m9q3", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220", "name": "https://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/composer/composer/commit/199ad81a9cc6a2a5164ad79a8da26b2e19e521af", "name": "https://github.com/composer/composer/commit/199ad81a9cc6a2a5164ad79a8da26b2e19e521af", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/composer/composer/releases/tag/2.10.3", "name": "https://github.com/composer/composer/releases/tag/2.10.3", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/composer/composer/releases/tag/2.2.30", "name": "https://github.com/composer/composer/releases/tag/2.2.30", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-78", "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-01T20:06:48.375Z"}}}, "cveMetadata": {"cveId": "CVE-2026-84361", "state": "PUBLISHED", "dateUpdated": "2026-09-03T03:56:08.149Z", "dateReserved": "2026-09-01T16:27:58.128Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-09-01T20:06:48.375Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "composer", "vendor": "composer", "versions": [{"status": "affected", "version": ">= 1.0, < 2.2.30"}, {"status": "affected", "version": ">= 2.3.0, < 2.10.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-84361", "lastModified": "2026-09-09T21:09:13.080", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "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/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-84361", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-02T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-09-01T21:18:47.023", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220"}, {"source": "security-advisories@github.com", "url": "https://github.com/composer/composer/commit/199ad81a9cc6a2a5164ad79a8da26b2e19e521af"}, {"source": "security-advisories@github.com", "url": "https://github.com/composer/composer/releases/tag/2.10.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/composer/composer/releases/tag/2.2.30"}, {"source": "security-advisories@github.com", "url": "https://github.com/composer/composer/security/advisories/GHSA-rvx4-ffvw-m9q3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "composer: Composer: Arbitrary code execution via malicious Perforce source URL", "id": "2527051", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2527051"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-78", "details": ["A flaw was found in Composer. A malicious dependency package from a custom Composer repository or an untrusted `composer.lock` file could exploit a vulnerability in how Composer handles Perforce source URLs. By setting `source.type` to `perforce` and `source.url` to an `rsh:` or `jsh:` P4PORT value, an attacker could cause the Perforce `p4` client to execute arbitrary local commands. This could lead to arbitrary code execution with the privileges of the user or continuous integration (CI) account running Composer."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, avoid installing the Perforce `p4` client on systems where Composer is used, unless explicitly required. Additionally, ensure that Composer only processes dependencies from trusted repositories and `composer.lock` files to prevent the introduction of malicious `source.url` values."}, "name": "CVE-2026-84361", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "composer", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-01T20:06:48Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-84361\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-84361\nhttps://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220\nhttps://github.com/composer/composer/commit/199ad81a9cc6a2a5164ad79a8da26b2e19e521af\nhttps://github.com/composer/composer/releases/tag/2.10.3\nhttps://github.com/composer/composer/releases/tag/2.2.30\nhttps://github.com/composer/composer/security/advisories/GHSA-rvx4-ffvw-m9q3"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1.0,2.2.30)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.3.0,2.10.3)"}}], "enrichment": {"confidence": 92.0, "confidence_source": "matching", "scores": [{"score": 92.0, "source": "matching"}]}, "original": {"product": "composer", "source": "cna", "vendor": "composer"}, "product": "composer", "vendor": "getcomposer"}], "created": "2026-09-02T03:45:04.581518+00:00", "updated": "2026-09-02T22:10:20.768180+00:00", "vendors": ["getcomposer", "getcomposer$PRODUCT$composer"]}