CVE-2026-45539

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45539", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-12T17:48:47.878Z", "datePublished": "2026-05-15T16:02:37.591Z", "dateUpdated": "2026-05-15T16:41:24.808Z"}, "containers": {"cna": {"title": "Microsoft APM: Symlinks under `.apm/prompts/` and `.apm/agents/` are dereferenced during `apm install`, copying host-local file contents into the project tree", "problemTypes": [{"descriptions": [{"cweId": "CWE-59", "lang": "en", "description": "CWE-59: Improper Link Resolution Before File Access ('Link Following')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-200", "lang": "en", "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4"}], "affected": [{"vendor": "microsoft", "product": "apm", "versions": [{"version": ">= 0.5.4, < 0.13.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-15T16:02:37.591Z"}, "descriptions": [{"lang": "en", "value": "Microsoft APM is an open-source, community-driven dependency manager for AI agents. From 0.5.4 to 0.12.4, two primitive integrators in apm-cli enumerate package files with bare Path.glob() / Path.rglob() calls and read each match with Path.read_text(), transparently following symbolic links. A symlink committed inside a remote APM dependency under .apm/prompts/<x>.prompt.md or .apm/agents/<x>.agent.md is preserved verbatim into apm_modules/ on clone and then dereferenced during integration, with the resolved content written as a regular file into the project's deploy directories. The package content_hash, the pre-deploy SecurityGate scan, and apm audit do not flag this. The deploy roots are not added to the auto-generated .gitignore, so the resulting files are staged by git add by default. This vulnerability is fixed in 0.13.0."}], "source": {"advisory": "GHSA-q5pp-gvjg-h7v4", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-15T16:41:16.377667Z", "id": "CVE-2026-45539", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-15T16:41:24.808Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45539", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-12T17:48:47.878Z", "datePublished": "2026-05-15T16:02:37.591Z", "dateUpdated": "2026-05-15T16:41:24.808Z"}, "containers": {"cna": {"title": "Microsoft APM: Symlinks under `.apm/prompts/` and `.apm/agents/` are dereferenced during `apm install`, copying host-local file contents into the project tree", "problemTypes": [{"descriptions": [{"cweId": "CWE-59", "lang": "en", "description": "CWE-59: Improper Link Resolution Before File Access ('Link Following')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-200", "lang": "en", "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4"}], "affected": [{"vendor": "microsoft", "product": "apm", "versions": [{"version": ">= 0.5.4, < 0.13.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-15T16:02:37.591Z"}, "descriptions": [{"lang": "en", "value": "Microsoft APM is an open-source, community-driven dependency manager for AI agents. From 0.5.4 to 0.12.4, two primitive integrators in apm-cli enumerate package files with bare Path.glob() / Path.rglob() calls and read each match with Path.read_text(), transparently following symbolic links. A symlink committed inside a remote APM dependency under .apm/prompts/<x>.prompt.md or .apm/agents/<x>.agent.md is preserved verbatim into apm_modules/ on clone and then dereferenced during integration, with the resolved content written as a regular file into the project's deploy directories. The package content_hash, the pre-deploy SecurityGate scan, and apm audit do not flag this. The deploy roots are not added to the auto-generated .gitignore, so the resulting files are staged by git add by default. This vulnerability is fixed in 0.13.0."}], "source": {"advisory": "GHSA-q5pp-gvjg-h7v4", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-45539", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-15T16:41:16.377667Z"}}}], "references": [{"url": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-15T16:41:10.649Z"}}]}}

{"affected": [{"affectedData": [{"product": "apm", "vendor": "microsoft", "versions": [{"status": "affected", "version": ">= 0.5.4, < 0.13.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Microsoft APM is an open-source, community-driven dependency manager for AI agents. From 0.5.4 to 0.12.4, two primitive integrators in apm-cli enumerate package files with bare Path.glob() / Path.rglob() calls and read each match with Path.read_text(), transparently following symbolic links. A symlink committed inside a remote APM dependency under .apm/prompts/<x>.prompt.md or .apm/agents/<x>.agent.md is preserved verbatim into apm_modules/ on clone and then dereferenced during integration, with the resolved content written as a regular file into the project's deploy directories. The package content_hash, the pre-deploy SecurityGate scan, and apm audit do not flag this. The deploy roots are not added to the auto-generated .gitignore, so the resulting files are staged by git add by default. This vulnerability is fixed in 0.13.0."}, {"lang": "es", "value": "Microsoft APM es un gestor de dependencias de c\u00f3digo abierto, impulsado por la comunidad, para agentes de IA. Desde la versi\u00f3n 0.5.4 hasta la 0.12.4, dos integradores primitivos en apm-cli enumeran archivos de paquete con llamadas directas a Path.glob() / Path.rglob() y leen cada coincidencia con Path.read_text(), siguiendo de forma transparente los enlaces simb\u00f3licos. Un enlace simb\u00f3lico (symlink) comprometido dentro de una dependencia APM remota bajo .apm/prompts/[x].prompt.md o .apm/agents/[x].agent.md se conserva literalmente en apm_modules/ al clonar y luego se desreferencia durante la integraci\u00f3n, con el contenido resuelto escrito como un archivo regular en los directorios de despliegue del proyecto. El content_hash del paquete, el escaneo SecurityGate previo al despliegue y la auditor\u00eda de apm no marcan esto. Las ra\u00edces de despliegue no se a\u00f1aden al .gitignore auto-generado, por lo que los archivos resultantes son preparados por git add por defecto. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 0.13.0."}], "id": "CVE-2026-45539", "lastModified": "2026-10-26T14:10:00.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45539", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-15T16:41:16.377667Z", "version": "2.0.3"}}]}, "published": "2026-05-15T17:16:48.887", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}, {"lang": "en", "value": "CWE-200"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.5.4,0.13.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "apm", "vendor": "microsoft"}], "created": "2026-05-15T17:30:04.550140+00:00", "updated": "2026-05-17T17:01:30.694383+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$apm"]}