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    CVE-2021-26919

    Apache Druid allows users to read data from other database systems using JDBC. This functionality is to allow trusted users with the proper permissions to set up lookups or submit ingestion tasks. The MySQL JDBC driver supports certain properties, which, if left unmitigated, can allow an attacker to execute arbitrary code from a hacker-controlled malicious MySQL server within Druid server processes. This issue was addressed in Apache Druid 0.20.2

    Published:Mar 30, 2021
    Last Modified:Feb 13, 2025
    EPS:Mar 30, 2021
    EPSS Score:0.82388
    CVSS Score:8.8

    Affected Products

    Vendor
    Apache
    Product
    Druid

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-23906 (CVSS 9.8) — Affected Products and Versions * Apache Druid * Affected Versions: 0.17.0 through 35.x (all versions pri…
    CVE-2025-59390 (CVSS 9.8) — Apache Druid’s Kerberos authenticator uses a weak fallback secret when the `druid.auth.authenticator.kerberos.…
    CVE-2025-27888 (CVSS 5.8) — Severity: medium (5.8) / important Server-Side Request Forgery (SSRF), Improper Neutralization of Input Durin…
    CVE-2024-45537 (CVSS 6.5) — Apache Druid allows users with certain permissions to read data from other database systems using JDBC. This f…
    CVE-2024-45384 (CVSS 5.3) — Padding Oracle vulnerability in Apache Druid extension, druid-pac4j. This could allow an attacker to manipulat…
    CVE-2022-28889 (CVSS 4.3) — In Apache Druid 0.22.1 and earlier, the server did not set appropriate headers to prevent clickjacking. Druid …
    CVE-2021-44791 (CVSS 6.1) — In Apache Druid 0.22.1 and earlier, certain specially-crafted links result in unescaped URL parameters being s…
    CVE-2021-36749 (CVSS 6.5) — In the Druid ingestion system, the InputSource is used for reading data from a certain data source. However, t…
    CVE-2021-26920 (CVSS 6.5) — In the Druid ingestion system, the InputSource is used for reading data from a certain data source. However, t…
    CVE-2021-25646 (CVSS 8.8) — Apache Druid includes the ability to execute user-provided JavaScript code embedded in various types of reques…

    References

    https://lists.apache.org/thread.html/r443e2916c612fbd119839c0fc0729327d6031913a75081adac5b43ad%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/r470f8c92eb5df45f41b3ae609b6315b6c5ff51b3ceb2f09f00ca620f%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/r6bc68264170046448f823d12c17fd1fd875251d97d60869f58709872%40%3Ccommits.druid.apache.org%3E
    https://lists.apache.org/thread.html/r7a531ec123570cb7875ff991cf115f99e9ef99a48b3cf3fa4f9d9864%40%3Ccommits.druid.apache.org%3E
    https://lists.apache.org/thread.html/ra85fa7d31f9bec1148ffd2e4030934927caa8bff89bca9f61f75e697%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/rd87451fce34df54796e66321c40d743a68fb4553d72e7f6f0bc62ebd%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/re0910cf4c784897774427fecd95912fb565a6bd06d924a55e70bbbfc%40%3Ccommits.druid.apache.org%3E
    https://lists.apache.org/thread.html/re4c5deb0aae4bace69844d15c9fd1699e907ebfee93bc3926474d110%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/rf3ea2a4018e87e6c45d36cf8479af7727dcc276edabd2f7cf59e0c5f%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/r443e2916c612fbd119839c0fc0729327d6031913a75081adac5b43ad%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/r470f8c92eb5df45f41b3ae609b6315b6c5ff51b3ceb2f09f00ca620f%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/r6bc68264170046448f823d12c17fd1fd875251d97d60869f58709872%40%3Ccommits.druid.apache.org%3E
    https://lists.apache.org/thread.html/r7a531ec123570cb7875ff991cf115f99e9ef99a48b3cf3fa4f9d9864%40%3Ccommits.druid.apache.org%3E
    https://lists.apache.org/thread.html/ra85fa7d31f9bec1148ffd2e4030934927caa8bff89bca9f61f75e697%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/rd87451fce34df54796e66321c40d743a68fb4553d72e7f6f0bc62ebd%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/re0910cf4c784897774427fecd95912fb565a6bd06d924a55e70bbbfc%40%3Ccommits.druid.apache.org%3E
    https://lists.apache.org/thread.html/re4c5deb0aae4bace69844d15c9fd1699e907ebfee93bc3926474d110%40%3Cdev.druid.apache.org%3E
    https://lists.apache.org/thread.html/rf3ea2a4018e87e6c45d36cf8479af7727dcc276edabd2f7cf59e0c5f%40%3Cdev.druid.apache.org%3E

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High