---
title: "CVE-2018-8026\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2018-8026?format=md
keywords: index, follow
---

# CVE-2018-8026

Publication date 5 July 2018

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**5.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2018-8026?format=md#impact-score)

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## Description

This vulnerability in Apache Solr 6.0.0 to 6.6.4 and 7.0.0 to 7.3.1 relates
to an XML external entity expansion (XXE) in Solr config files
(currency.xml, enumsConfig.xml referred from schema.xml, TIKA parsecontext
config file). In addition, Xinclude functionality provided in these config
files is also affected in a similar way. The vulnerability can be used as
XXE using file/ftp/http protocols in order to read arbitrary local files
from the Solr server or the internal network. The manipulated files can be
uploaded as configsets using Solr's API, allowing to exploit that
vulnerability.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| lucene-solr | 19.10 eoan | Not affected |
| 19.04 disco | Ignored end of life |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Ignored end of life |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.5 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | None |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8026)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-8026)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-8026)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-8026)

### Other references

* <https://issues.apache.org/jira/browse/SOLR-12450>
* <https://mail-archives.apache.org/mod_mbox/lucene-solr-user/201807.mbox/%3C0cdc01d413b7%24f97ba580%24ec72f080%24%40apache.org%3E>
* <https://www.cve.org/CVERecord?id=CVE-2018-8026>