CVE-2021-26544: Apache Livy (Incubating) is vulnerable to cross site scripting

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-20 · updated 2026-06-17
Weakness: CWE-79

Description

Livy server version 0.7.0-incubating (only) is vulnerable to a cross site scripting issue in the session name. A malicious user could use this flaw to access logs and results of other users' sessions and run jobs with their privileges. This issue is fixed in Livy 0.7.1-incubating.

Affected products

Apache Software Foundation Apache Livy: 0.7.0-incubating

References

http://www.openwall.com/lists/oss-security/2021/02/20/1
https://github.com/apache/incubator-livy/commit/4d8a912699683b973eee76d4e91447d769a0cb0d
https://lists.apache.org/thread.html/r2db14e7fd1e5ec2519e8828d43529bad623d75698cc7918af3a3f3ed%40%3Cuser.livy.apache.org%3E
http://www.openwall.com/lists/oss-security/2021/02/20/1
https://github.com/apache/incubator-livy/commit/4d8a912699683b973eee76d4e91447d769a0cb0d
https://lists.apache.org/thread.html/r2db14e7fd1e5ec2519e8828d43529bad623d75698cc7918af3a3f3ed%40%3Cuser.livy.apache.org%3E

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