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Advisory record · GHSA-r4x2-3cq5-hqvp

The defaults settings for the CORS filter provided in Apache Tomcat are insecure and enable 'supportsCredentials' for all origins

CVSS 9.8 CriticalCriticalEPSS 0.21 · 97th percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.
  • CVSS score 9.8 (7.0 or more) and EPSS 0.21 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the GitHub Advisory Database at 17 Oct 2018, 16:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.tomcat.embed:tomcat-embed-coreMaven>=9.0.0.M1, <9.0.9 || >=8.5.0, <8.5.32 || >=8.0.0RC1, <8.0.53 || >=7.0.41, <7.0.889.0.9, 8.5.32, 8.0.53, 7.0.88
Identifiers
GHSA-r4x2-3cq5-hqvp · CVE-2018-8014
Weakness (CWE)
CWE-1188
Tags
Published
17 Oct 2018
Updated
12 Mar 2024

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Apache Tomcat (org.apache.tomcat.embed:tomcat-embed-core) versions 9.0.0.M1 to 9.0.8, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, and 7.0.41 to 7.0.88 have insecure default settings in the CORS filter, which enable supportsCredentials for all origins. The source says most users are not affected because the filter is expected to be configured for their environment rather than used with defaults. Upgrade to 9.0.9, 8.5.32, 8.0.53, or 7.0.88, or configure the CORS filter explicitly instead of relying on its defaults.

Written 8 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.21, the 97th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:13 UTC First seen by agentprime
  2. 31 Oct 2026, 15:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.