{"answers":{"affected":"4 open source packages ship an affected version, including apache-airflow and airflow. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-38540 exists.","fix":"Upgrade apache-airflow to 2.1.3 or later.","what":"CVE-2021-38540 is a critical missing authorization vulnerability in Apache Airflow, published on 9 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-38540 and fix it if it is affected.\n\nWhat it is: CVE-2021-38540 is a critical missing authorization vulnerability in Apache Airflow, published on 9 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-38540 exists.\n\nAffected packages and fixed versions:\n- apache-airflow (PyPI): affected from 2.0.0; fixed in 2.1.3\n- apache-airflow (PyPI): affected from 2.0.0; fixed in 2.1.3\n- apache-airflow (PyPI): affected from 2.0.0; fixed in 2.1.3\n- airflow (Bitnami): affected from 2.0.0; fixed in 2.1.3\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-38540/ (Markdown: https://insights.sbomify.com/CVE-2021-38540/index.md)","id":"CVE-2021-38540","markdown":"https://insights.sbomify.com/CVE-2021-38540/index.md","name":"CVE-2021-38540","record":{"aliases":["BIT-airflow-2021-38540","GHSA-h88f-r7cw-8fv3","PYSEC-2021-326"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution","data_modify","denial_of_service","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache Airflow","requires_auth":"none","summary":"Unauthenticated attackers can modify Airflow variables via the import endpoint, leading to potential remote code execution, data modification, or denial of service.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"airflow","vendor":"apache"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"},{"id":"CWE-269","name":"Improper Privilege Management"}],"description":"The variable import endpoint was not protected by authentication in Airflow \u003e=2.0.0, \u003c2.1.3. This allowed unauthenticated users to hit that endpoint to add/modify Airflow variables used in DAGs, potentially resulting in a denial of service, information disclosure or remote code execution. This issue affects Apache Airflow \u003e=2.0.0, \u003c2.1.3.","ecosystems":["Bitnami","PyPI"],"exploits":{"exploitdb":0,"first_seen":"2022-06-13","github_poc":1,"max_poc_stars":4,"metasploit":0,"nuclei":1,"refs":[{"date":"2022-06-13T11:43:26Z","kind":"github_poc","ref":"https://github.com/Captain-v-hook/PoC-for-CVE-2021-38540-","stars":4,"title":"Missing Authentication on Critical component CVE-2021-38540"},{"date":null,"kind":"nuclei","ref":"http/cves/2021/CVE-2021-38540.yaml","stars":null,"title":"Apache Airflow - Unauthenticated Variable Import"}],"tier":"weaponised"},"has_fix":true,"headline":"Apache Airflow: Variable Import endpoint missed authentication check","id":"CVE-2021-38540","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:airflow","products":["apache:airflow"],"type":"missing_authorization","year":"2021"},"n_packages":4,"n_references":2,"next":{"headline":"Apache James vulnerable to STARTTLS command injection (IMAP and POP3)","id":"CVE-2021-38542"},"packages":[{"ecosystem":"Bitnami","fixed":["2.1.3"],"introduced":["2.0.0"],"last_affected":[],"package":"airflow","purl":"pkg:bitnami/airflow","source":"BIT-airflow-2021-38540"},{"ecosystem":"PyPI","fixed":["2.1.3"],"introduced":["2.0.0"],"last_affected":[],"package":"apache-airflow","purl":null,"source":"GHSA-h88f-r7cw-8fv3"},{"ecosystem":"PyPI","fixed":["2.1.3"],"introduced":["2.0.0"],"last_affected":[],"package":"apache-airflow","purl":"pkg:pypi/apache-airflow","source":"GHSA-h88f-r7cw-8fv3"},{"ecosystem":"PyPI","fixed":["2.1.3"],"introduced":["2.0.0"],"last_affected":[],"package":"apache-airflow","purl":"pkg:pypi/apache-airflow","source":"PYSEC-2021-326"}],"prev":{"headline":"Privilege escalation in n/a","id":"CVE-2021-38539"},"products":["Apache Airflow"],"published":"2021-09-09","related":[{"cvss_score":9.8,"headline":"Apache Airflow's Experimental API Authentication Bypass","id":"CVE-2020-13927","kev_date_added":"2022-01-18","published":"2020-11-10"},{"cvss_score":8.8,"headline":"Apache Airflow Command Injection","id":"CVE-2020-11978","kev_date_added":"2022-01-18","published":"2020-07-16"},{"cvss_score":9.8,"headline":"Apache Airflow: DAG author RCE on webserver via unrestricted import_string() in BaseSerialization.deserialize()","id":"CVE-2026-33264","kev_date_added":null,"published":"2026-07-07"},{"cvss_score":9.8,"headline":"Apache Airflow: Privilege escalation using airflow logs","id":"CVE-2023-25754","kev_date_added":null,"published":"2023-05-08"},{"cvss_score":9.8,"headline":"Apache Airflow, Apache Airflow MySQL Provider: Arbitrary file read via MySQL provider in Apache Airflow","id":"CVE-2023-22884","kev_date_added":null,"published":"2023-01-21"},{"cvss_score":9.8,"headline":"Apache Airflow Pinot provider allowed Command Injection","id":"CVE-2022-38649","kev_date_added":null,"published":"2022-11-22"},{"cvss_score":9.8,"headline":"Apache Airlfow Pig Provider RCE","id":"CVE-2022-40189","kev_date_added":null,"published":"2022-11-22"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["Apache Software Foundation"]},"summary":"Unauthenticated attackers can modify Airflow variables via the import endpoint, leading to potential remote code execution, data modification, or denial of service.","url":"https://insights.sbomify.com/CVE-2021-38540/"}