# CVE-2021-26544: Apache Livy Cross-site scripting (XSS) in session names

Source: https://junglewise.ai/threats/cve-2021-26544-apache-livy-cross-site-scripting-xss-in-session-names  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-05-13  
License: CC BY 4.0 with a link back

CVE-2021-26544 · Severity: low · CVSS 3.1 · Published 2021-05-13

Apache Livy Cross-site scripting (XSS) in session names

Technologies: [org.apache.livy:livy-server (Maven)](https://junglewise.ai/threats/technologies/org-apache-livy-livy-server). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2021-26544 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-26544 being exploited in the wild.

**How severe is CVE-2021-26544?** Low severity, with a CVSS score of 3.1, published 13 May 2021.

**Which products and versions are affected?** org.apache.livy:livy-server (Maven) ECOSYSTEM:introduced=0.7.0-incubating,fixed=0.7.1-incubating.

**Is there a fix for CVE-2021-26544?** Yes. org.apache.livy:livy-server (Maven): upgrade to 0.7.1-incubating or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-26544?** Check whether you run org.apache.livy:livy-server (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.apache.livy:livy-server (Maven): upgrade to 0.7.1-incubating or later

  ```sh
  # set org.apache.livy:livy-server to 0.7.1-incubating in your pom.xml or build.gradle
  ```


## Affected products

- org.apache.livy:livy-server (Maven) ECOSYSTEM:introduced=0.7.0-incubating,fixed=0.7.1-incubating

## Identifiers

- CVE-2021-26544
- GHSA-74qp-233x-p5j8

## Related threats

- [Apache Livy: Restrict file access](https://junglewise.ai/threats/cve-2025-60012-apache-livy-restrict-file-access)
- [Apache Livy: Unauthorized directory access](https://junglewise.ai/threats/cve-2025-66249-apache-livy-unauthorized-directory-access)