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Fencer Vulns
high 8.8

CVE-2021-26919 in the critical feed json

Apache Druid Authenticated users can execute arbitrary code from malicious MySQL database systems.

published 2021-03-30 5 y ago modified 2026-06-17 4 mo ago also GHSA-jj4f-p7vv-j4v9 , EUVD-2021-1343

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
35.2%
EPSS 35.2% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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

Patch / fix

  • maven org.apache.druid:druid 0.20.2
  • apache druid 0.20.2

Exploit prediction

35.19% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.druid:druid
<0.20.2
0.20.2

Affected products

  • Apache Software Foundation Apache Druid

Classification

Weakness
  • CWE-668 Exposure of Resource to Wrong Sphere

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.