Apache Tomcat: HTTP/2 DoS via malformed request
Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail. This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
BIT-tomcat-2026-78437
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-2026-78437
tomcat
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 9.0.122
Source 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": "9.0.116"
},
{
"fixed": "9.0.122"
},
{
"introduced": "10.1.53"
},
{
"fixed": "10.1.60"
},
{
"introduced": "11.0.19"
},
{
"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:L/I:L/A:L"
}
],
"database_specific": {
"source": "https://github.com/bitnami/vulndb/tree/main/data/tomcat/BIT-tomcat-2026-78437.json"
}
}
]- Related CVEs
- CVE-2026-78437
Source reference:
/aliases
Publisher severity
high
Source reference: /database_specific/severity
- Event
- #59550 · Revision 1
- Added to Heist Feed
- Publisher date