Skip to content
Heist/ feed
Critical

Apache Tomcat: Bypass of security constraints for WebSocket endpoints

Type: advisorySource: Official CVE ListRisk context updated1 source record

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-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 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.

Announced Source revision 2
Original source ↗
CVE context updated. The publisher announcement is unchanged.

CVE-2026-76183

Primary source · Revision 2

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-76183

Apache Tomcat

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Apache Software Foundation",
    "product": "Apache Tomcat",
    "versions": [
      {
        "status": "affected",
        "version": "11.0.0-M1",
        "versionType": "semver",
        "lessThanOrEqual": "11.0.25"
      },
      {
        "status": "affected",
        "version": "10.1.0-M1",
        "versionType": "semver",
        "lessThanOrEqual": "10.1.59"
      },
      {
        "status": "affected",
        "version": "9.0.0.M1",
        "versionType": "semver",
        "lessThanOrEqual": "9.0.121"
      },
      {
        "status": "affected",
        "version": "8.5.0",
        "versionType": "semver",
        "lessThanOrEqual": "8.5.100"
      },
      {
        "status": "affected",
        "version": "7.0.43",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.109"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "7.0.43",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-76183

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-76183 · Critical

tomcat

Event
#59545 · Revision 2
Added to Heist Feed
Publisher date
Read the original announcement