Apache Tomcat: Bypass of security constraints for WebSocket endpoints
Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed. This issue affects Apache Tomcat: from 11.0.0 through 11.0.25, from 10.1.0 through 10.1.59, from 9.0.0 through 9.0.121. The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. 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-2026-76183
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-2026-76183
tomcat
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 9.0.45
Source reference:
/affected/0/ranges10.1.60Source reference:
/affected/0/ranges11.0.26Source reference:
/affected/0/ranges9.0.122Source 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": "0"
},
{
"fixed": "9.0.45"
},
{
"introduced": "10.1.0"
},
{
"fixed": "10.1.60"
},
{
"introduced": "11.0.0"
},
{
"fixed": "11.0.26"
},
{
"introduced": "9.0.0"
},
{
"fixed": "9.0.122"
}
]
}
],
"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:H/I:H/A:H"
}
],
"database_specific": {
"source": "https://github.com/bitnami/vulndb/tree/main/data/tomcat/BIT-tomcat-2026-76183.json"
}
}
]- Related CVEs
- CVE-2026-76183
Source reference:
/aliases
Publisher severity
critical
Source reference: /database_specific/severity
- Event
- #59544 · Revision 1
- Added to Heist Feed
- Publisher date