Apache Tomcat: DoS via busy wait during WebSocket close
Uncontrolled Resource Consumption vulnerability in Apache Tomcat during sending of WebSocket close message enabled a DoS attack. This issue affects Apache Tomcat: from 11.0.0 through 11.0.25, from 10.1.8 through 10.1.59, from 9.0.74 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.88 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
BIT-tomcat-2026-77791
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:BIT-tomcat-2026-77791
tomcat
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 9.0.45
Source reference:
/affected/0/ranges9.0.122Source reference:
/affected/0/ranges10.1.60Source reference:
/affected/0/ranges11.0.26Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "8.5.88"
},
{
"fixed": "9.0.45"
},
{
"introduced": "9.0.74"
},
{
"fixed": "9.0.122"
},
{
"introduced": "10.1.8"
},
{
"fixed": "10.1.60"
},
{
"introduced": "11.0.0"
},
{
"fixed": "11.0.26"
}
]
}
],
"package": {
"name": "tomcat",
"purl": "pkg:bitnami/tomcat",
"ecosystem": "Bitnami"
},
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"database_specific": {
"source": "https://github.com/bitnami/vulndb/tree/main/data/tomcat/BIT-tomcat-2026-77791.json"
}
}
]- Related CVEs
- CVE-2026-77791
Source reference:
/aliases
Publisher severity
high
Source reference: /database_specific/severity
- Event
- #59477 · Revision 1
- Added to Heist Feed
- Publisher date