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Apache Tomcat: WebSocket DoS due to lost asynchronous write timeout

Type: advisorySource: OSV1 source record

Missing release of resource after effective lifetime, Comparison using wrong factors vulnerability in Apache Tomcat allows a denial of service as a result of lost time outs for asynchronous WebSocket writes. 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 EOL 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 1
Original source ↗

BIT-tomcat-2026-79677

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-2026-79677

tomcat

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
9.0.45

Source reference: /affected/0/ranges

10.1.60

Source reference: /affected/0/ranges

11.0.26

Source reference: /affected/0/ranges

9.0.122

Source 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:N/I:N/A:H"
      }
    ],
    "database_specific": {
      "source": "https://github.com/bitnami/vulndb/tree/main/data/tomcat/BIT-tomcat-2026-79677.json"
    }
  }
]
Related CVEs
CVE-2026-79677

Source reference: /aliases

Publisher severity

high

Source reference: /database_specific/severity

Event
#59552 · Revision 1
Added to Heist Feed
Publisher date
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