CVE Explorer
CVE-2026-66299
Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example.
This issue affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through 9.0.120. Users who have followed the security guidance to remove the examples web application are not affected by this issue.
Users are recommended to remove the examples web application or to upgrade to version 11.0.25, 10.1.58 or 9.0.121 (when released), which fix the issue.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Apache Tomcat","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"11.0.24","status":"affected","version":"11.0.0-M20","versionType":"semver"},{"lessThanOrEqual":"10.1.57","status":"affected","version":"10.1.24","versionType":"semver"},{"lessThanOrEqual":"9.0.120","status":"affected","version":"9.0.89","versionType":"semver"},{"lessThanOrEqual":"8.5.100","status":"unaffected","version":"0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c28b017d85e2c89e9e794c570621ce548f74ee6340c156c46bf0480c2723555c · sha256:4599eccae1ce24e8… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:c28b017d85e2c89e9e794c570621ce548f74ee6340c156c46bf0480c2723555c · sha256:4599eccae1ce24e8… · /containers/adp/1/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:c28b017d85e2c89e9e794c570621ce548f74ee6340c156c46bf0480c2723555c · sha256:4599eccae1ce24e8… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"url":"http://www.openwall.com/lists/oss-security/2026/07/28/25"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c28b017d85e2c89e9e794c570621ce548f74ee6340c156c46bf0480c2723555c · sha256:4599eccae1ce24e8… · /containers/adp/0/references/0
{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/8owczcc1o8qw1rxmg9gvfk4w2jnh4l5k"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c28b017d85e2c89e9e794c570621ce548f74ee6340c156c46bf0480c2723555c · sha256:4599eccae1ce24e8… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.