CVE-2026-40861

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-40861", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-04-15T13:58:24.192Z", "datePublished": "2026-06-01T07:55:37.566Z", "dateUpdated": "2026-11-03T06:54:55.643Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-11-03T06:54:55.643Z"}, "title": "Apache Airflow: Arbitrary File Read via Log Symlink following in FileTaskHandler", "problemTypes": [{"descriptions": [{"description": "CWE-59: Improper Link Resolution Before File Access ('Link Following')", "lang": "en", "cweId": "CWE-59", "type": "CWE"}]}], "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Airflow", "collectionURL": "https://pypi.python.org", "packageName": "apache-airflow", "versions": [{"status": "affected", "version": "0", "lessThan": "3.0.0", "versionType": "semver"}], "defaultStatus": "unaffected", "packageURL": "pkg:pypi/apache-airflow"}, {"vendor": "Apache Software Foundation", "product": "Apache Airflow", "collectionURL": "https://pypi.python.org", "packageName": "apache-airflow-core", "versions": [{"status": "affected", "version": "3.0.0", "lessThan": "3.2.2", "versionType": "semver"}], "defaultStatus": "unaffected", "packageURL": "pkg:pypi/apache-airflow-core"}], "descriptions": [{"value": "A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack \u2014 e.g. `/etc/passwd` or `airflow.cfg`) or (b) supply a `task_id` containing `..` sequences accepted by the Task SDK's `KEY_REGEX` (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`, leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared with the API server. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled paths cannot reach the API server's filesystem.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack \u2014 e.g. `/etc/passwd` or `airflow.cfg`) or (b) supply a `task_id` containing `..` sequences accepted by the Task SDK's `KEY_REGEX` (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`, leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared with the API server. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled paths cannot reach the API server's filesystem."}]}], "references": [{"url": "https://github.com/apache/airflow/pull/65325", "tags": ["patch"]}, {"url": "https://lists.apache.org/thread/823334db2559xjlwt59gpzjz47thnscl", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "low"}}}], "credits": [{"lang": "en", "value": "Silas Boch", "type": "finder"}, {"lang": "en", "value": "Lakshmikanthan K (letchupkt)", "type": "finder"}, {"lang": "en", "value": "Jarek Potiuk", "type": "remediation developer"}], "x_generator": {"engine": "airflow-s/generate_cve_json.py"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/31/1"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-06-01T09:52:20.189Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-06-02T16:33:03.378849Z", "id": "CVE-2026-40861", "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": "2026-06-02T16:42:26.285Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/31/1"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-06-01T09:52:20.189Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-40861", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-02T16:33:03.378849Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-02T16:33:39.911Z"}}], "cna": {"title": "Apache Airflow: Arbitrary File Read via Log Symlink following in FileTaskHandler", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "Silas Boch"}, {"lang": "en", "type": "finder", "value": "Lakshmikanthan K (letchupkt)"}, {"lang": "en", "type": "remediation developer", "value": "Jarek Potiuk"}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "low"}}}], "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Airflow", "versions": [{"status": "affected", "version": "0", "lessThan": "3.0.0", "versionType": "semver"}], "packageURL": "pkg:pypi/apache-airflow", "packageName": "apache-airflow", "collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected"}, {"vendor": "Apache Software Foundation", "product": "Apache Airflow", "versions": [{"status": "affected", "version": "3.0.0", "lessThan": "3.2.2", "versionType": "semver"}], "packageURL": "pkg:pypi/apache-airflow-core", "packageName": "apache-airflow-core", "collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/apache/airflow/pull/65325", "tags": ["patch"]}, {"url": "https://lists.apache.org/thread/823334db2559xjlwt59gpzjz47thnscl", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "airflow-s/generate_cve_json.py"}, "descriptions": [{"lang": "en", "value": "A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack \u2014 e.g. `/etc/passwd` or `airflow.cfg`) or (b) supply a `task_id` containing `..` sequences accepted by the Task SDK's `KEY_REGEX` (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`, leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared with the API server. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled paths cannot reach the API server's filesystem.", "supportingMedia": [{"type": "text/html", "value": "A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack \u2014 e.g. `/etc/passwd` or `airflow.cfg`) or (b) supply a `task_id` containing `..` sequences accepted by the Task SDK's `KEY_REGEX` (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`, leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared with the API server. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled paths cannot reach the API server's filesystem.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-59", "description": "CWE-59: Improper Link Resolution Before File Access ('Link Following')"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-11-03T06:54:55.643Z"}}}, "cveMetadata": {"cveId": "CVE-2026-40861", "state": "PUBLISHED", "dateUpdated": "2026-11-03T06:54:55.643Z", "dateReserved": "2026-04-15T13:58:24.192Z", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "datePublished": "2026-06-01T07:55:37.566Z", "assignerShortName": "apache"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected", "packageName": "apache-airflow", "packageURL": "pkg:pypi/apache-airflow", "product": "Apache Airflow", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "3.0.0", "status": "affected", "version": "0", "versionType": "semver"}]}, {"collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected", "packageName": "apache-airflow-core", "packageURL": "pkg:pypi/apache-airflow-core", "product": "Apache Airflow", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "3.2.2", "status": "affected", "version": "3.0.0", "versionType": "semver"}]}], "source": "security@apache.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*", "matchCriteriaId": "0893C3AA-26A4-4682-A36C-05E719EB2943", "versionEndExcluding": "3.2.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack \u2014 e.g. `/etc/passwd` or `airflow.cfg`) or (b) supply a `task_id` containing `..` sequences accepted by the Task SDK's `KEY_REGEX` (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`, leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared with the API server. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled paths cannot reach the API server's filesystem."}, {"lang": "es", "value": "Un autor de Dag podr\u00eda (a) crear un enlace simb\u00f3lico bajo el directorio de logs de su tarea apuntando a un archivo arbitrario legible por el proceso del servidor API (ataque de ruta de lectura - p. ej. '/etc/pass1d' o 'airflow.cfg') o (b) proporcionar un 'task_id' que contenga secuencias '..' aceptadas por el 'KEY_REGEX' del SDK de Tareas (ataque de ruta de escritura), y en ambos casos el FileTaskHandler resuelve la ruta del log fuera de la 'base_log_folder' configurada, filtrando o sobrescribiendo archivos arbitrarios. Solo afecta a despliegues donde la carpeta de logs del worker es compartida con el servidor API. Se aconseja a los usuarios actualizar a 'apache-airflow' 3.2.2 o posterior. Como mitigaci\u00f3n de defensa en profundidad, despliegue el worker y el servidor API con vol\u00famenes de log separados para que las rutas controladas por el worker no puedan alcanzar el sistema de archivos del servidor API."}], "id": "CVE-2026-40861", "lastModified": "2026-11-03T07:19:54.920", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40861", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-02T16:33:03.378849Z", "version": "2.0.3"}}]}, "published": "2026-06-01T09:16:17.893", "references": [{"source": "security@apache.org", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/apache/airflow/pull/65325"}, {"source": "security@apache.org", "tags": ["Mailing List", "Vendor Advisory"], "url": "https://lists.apache.org/thread/823334db2559xjlwt59gpzjz47thnscl"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/05/31/1"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}], "source": "security@apache.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.2.2)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Apache Airflow", "source": "cna", "vendor": "Apache Software Foundation"}, "product": "airflow", "vendor": "apache"}], "created": "2026-06-01T10:30:26.202320+00:00", "updated": "2026-06-02T18:30:15.034643+00:00", "vendors": ["apache", "apache$PRODUCT$airflow"]}