ubuntu-cve-2026-42498
Vulnerability from osv_ubuntu
Published
2026-05-12 16:16
Modified
2026-06-18 20:07
Summary
Details
Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.
Severity
7.3 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libtomcat9-embed-java",
"binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
},
{
"binary_name": "libtomcat9-java",
"binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
},
{
"binary_name": "tomcat9",
"binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
},
{
"binary_name": "tomcat9-admin",
"binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
},
{
"binary_name": "tomcat9-common",
"binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
},
{
"binary_name": "tomcat9-docs",
"binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
},
{
"binary_name": "tomcat9-examples",
"binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
},
{
"binary_name": "tomcat9-user",
"binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "tomcat9",
"purl": "pkg:deb/ubuntu/tomcat9@9.0.16-3ubuntu0.18.04.2+esm8?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.0.16-3ubuntu0.18.04.2+esm8"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"9.0.16-3~18.04.1",
"9.0.16-3ubuntu0.18.04.1",
"9.0.16-3ubuntu0.18.04.2",
"9.0.16-3ubuntu0.18.04.2+esm1",
"9.0.16-3ubuntu0.18.04.2+esm2",
"9.0.16-3ubuntu0.18.04.2+esm3",
"9.0.16-3ubuntu0.18.04.2+esm4",
"9.0.16-3ubuntu0.18.04.2+esm5",
"9.0.16-3ubuntu0.18.04.2+esm6",
"9.0.16-3ubuntu0.18.04.2+esm7"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libtomcat9-embed-java",
"binary_version": "9.0.31-1ubuntu0.9+esm3"
},
{
"binary_name": "libtomcat9-java",
"binary_version": "9.0.31-1ubuntu0.9+esm3"
},
{
"binary_name": "tomcat9",
"binary_version": "9.0.31-1ubuntu0.9+esm3"
},
{
"binary_name": "tomcat9-admin",
"binary_version": "9.0.31-1ubuntu0.9+esm3"
},
{
"binary_name": "tomcat9-common",
"binary_version": "9.0.31-1ubuntu0.9+esm3"
},
{
"binary_name": "tomcat9-docs",
"binary_version": "9.0.31-1ubuntu0.9+esm3"
},
{
"binary_name": "tomcat9-examples",
"binary_version": "9.0.31-1ubuntu0.9+esm3"
},
{
"binary_name": "tomcat9-user",
"binary_version": "9.0.31-1ubuntu0.9+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "tomcat9",
"purl": "pkg:deb/ubuntu/tomcat9@9.0.31-1ubuntu0.9+esm3?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.0.31-1ubuntu0.9+esm3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"9.0.24-1",
"9.0.27-1",
"9.0.31-1",
"9.0.31-1ubuntu0.1",
"9.0.31-1ubuntu0.2",
"9.0.31-1ubuntu0.3",
"9.0.31-1ubuntu0.4",
"9.0.31-1ubuntu0.5",
"9.0.31-1ubuntu0.6",
"9.0.31-1ubuntu0.7",
"9.0.31-1ubuntu0.8",
"9.0.31-1ubuntu0.9",
"9.0.31-1ubuntu0.9+esm1",
"9.0.31-1ubuntu0.9+esm2"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libtomcat9-embed-java",
"binary_version": "9.0.58-1ubuntu0.2+esm4"
},
{
"binary_name": "libtomcat9-java",
"binary_version": "9.0.58-1ubuntu0.2+esm4"
},
{
"binary_name": "tomcat9",
"binary_version": "9.0.58-1ubuntu0.2+esm4"
},
{
"binary_name": "tomcat9-admin",
"binary_version": "9.0.58-1ubuntu0.2+esm4"
},
{
"binary_name": "tomcat9-common",
"binary_version": "9.0.58-1ubuntu0.2+esm4"
},
{
"binary_name": "tomcat9-docs",
"binary_version": "9.0.58-1ubuntu0.2+esm4"
},
{
"binary_name": "tomcat9-examples",
"binary_version": "9.0.58-1ubuntu0.2+esm4"
},
{
"binary_name": "tomcat9-user",
"binary_version": "9.0.58-1ubuntu0.2+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "tomcat9",
"purl": "pkg:deb/ubuntu/tomcat9@9.0.58-1ubuntu0.2+esm4?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.0.58-1ubuntu0.2+esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"9.0.43-3",
"9.0.54-1",
"9.0.55-1",
"9.0.58-1",
"9.0.58-1ubuntu0.1",
"9.0.58-1ubuntu0.1+esm1",
"9.0.58-1ubuntu0.1+esm2",
"9.0.58-1ubuntu0.1+esm3",
"9.0.58-1ubuntu0.1+esm4",
"9.0.58-1ubuntu0.2",
"9.0.58-1ubuntu0.2+esm1",
"9.0.58-1ubuntu0.2+esm2",
"9.0.58-1ubuntu0.2+esm3"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libtomcat10-embed-java",
"binary_version": "10.1.16-1ubuntu0.1~esm4"
},
{
"binary_name": "libtomcat10-java",
"binary_version": "10.1.16-1ubuntu0.1~esm4"
},
{
"binary_name": "tomcat10",
"binary_version": "10.1.16-1ubuntu0.1~esm4"
},
{
"binary_name": "tomcat10-admin",
"binary_version": "10.1.16-1ubuntu0.1~esm4"
},
{
"binary_name": "tomcat10-common",
"binary_version": "10.1.16-1ubuntu0.1~esm4"
},
{
"binary_name": "tomcat10-docs",
"binary_version": "10.1.16-1ubuntu0.1~esm4"
},
{
"binary_name": "tomcat10-examples",
"binary_version": "10.1.16-1ubuntu0.1~esm4"
},
{
"binary_name": "tomcat10-user",
"binary_version": "10.1.16-1ubuntu0.1~esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "tomcat10",
"purl": "pkg:deb/ubuntu/tomcat10@10.1.16-1ubuntu0.1~esm4?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "10.1.16-1ubuntu0.1~esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"10.1.10-1",
"10.1.14-1",
"10.1.15-1",
"10.1.16-1",
"10.1.16-1ubuntu0.1~esm1",
"10.1.16-1ubuntu0.1~esm2",
"10.1.16-1ubuntu0.1~esm3"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libtomcat9-java",
"binary_version": "9.0.70-2ubuntu0.1+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "tomcat9",
"purl": "pkg:deb/ubuntu/tomcat9@9.0.70-2ubuntu0.1+esm3?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.0.70-2ubuntu0.1+esm3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"9.0.70-1ubuntu1",
"9.0.70-2",
"9.0.70-2ubuntu0.1",
"9.0.70-2ubuntu0.1+esm1",
"9.0.70-2ubuntu0.1+esm2"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libtomcat10-embed-java",
"binary_version": "10.1.40-1ubuntu1.25.10.1"
},
{
"binary_name": "libtomcat10-java",
"binary_version": "10.1.40-1ubuntu1.25.10.1"
},
{
"binary_name": "tomcat10",
"binary_version": "10.1.40-1ubuntu1.25.10.1"
},
{
"binary_name": "tomcat10-admin",
"binary_version": "10.1.40-1ubuntu1.25.10.1"
},
{
"binary_name": "tomcat10-common",
"binary_version": "10.1.40-1ubuntu1.25.10.1"
},
{
"binary_name": "tomcat10-docs",
"binary_version": "10.1.40-1ubuntu1.25.10.1"
},
{
"binary_name": "tomcat10-examples",
"binary_version": "10.1.40-1ubuntu1.25.10.1"
},
{
"binary_name": "tomcat10-user",
"binary_version": "10.1.40-1ubuntu1.25.10.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "tomcat10",
"purl": "pkg:deb/ubuntu/tomcat10@10.1.40-1ubuntu1.25.10.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "10.1.40-1ubuntu1.25.10.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"10.1.35-1",
"10.1.40-1",
"10.1.40-1ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libtomcat11-embed-java",
"binary_version": "11.0.6-1"
},
{
"binary_name": "libtomcat11-java",
"binary_version": "11.0.6-1"
},
{
"binary_name": "tomcat11",
"binary_version": "11.0.6-1"
},
{
"binary_name": "tomcat11-admin",
"binary_version": "11.0.6-1"
},
{
"binary_name": "tomcat11-common",
"binary_version": "11.0.6-1"
},
{
"binary_name": "tomcat11-docs",
"binary_version": "11.0.6-1"
},
{
"binary_name": "tomcat11-examples",
"binary_version": "11.0.6-1"
},
{
"binary_name": "tomcat11-user",
"binary_version": "11.0.6-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "tomcat11",
"purl": "pkg:deb/ubuntu/tomcat11@11.0.6-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"11.0.6-1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libtomcat9-java",
"binary_version": "9.0.95-1ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "tomcat9",
"purl": "pkg:deb/ubuntu/tomcat9@9.0.95-1ubuntu1.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.0.95-1ubuntu1.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"9.0.70-2ubuntu1.1",
"9.0.70-2ubuntu2",
"9.0.70-2ubuntu3",
"9.0.95-1ubuntu1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libtomcat10-embed-java",
"binary_version": "10.1.40-1ubuntu1.26.04.1"
},
{
"binary_name": "libtomcat10-java",
"binary_version": "10.1.40-1ubuntu1.26.04.1"
},
{
"binary_name": "tomcat10",
"binary_version": "10.1.40-1ubuntu1.26.04.1"
},
{
"binary_name": "tomcat10-admin",
"binary_version": "10.1.40-1ubuntu1.26.04.1"
},
{
"binary_name": "tomcat10-common",
"binary_version": "10.1.40-1ubuntu1.26.04.1"
},
{
"binary_name": "tomcat10-docs",
"binary_version": "10.1.40-1ubuntu1.26.04.1"
},
{
"binary_name": "tomcat10-examples",
"binary_version": "10.1.40-1ubuntu1.26.04.1"
},
{
"binary_name": "tomcat10-user",
"binary_version": "10.1.40-1ubuntu1.26.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "tomcat10",
"purl": "pkg:deb/ubuntu/tomcat10@10.1.40-1ubuntu1.26.04.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "10.1.40-1ubuntu1.26.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"10.1.40-1ubuntu1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libtomcat9-java",
"binary_version": "9.0.115-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "tomcat9",
"purl": "pkg:deb/ubuntu/tomcat9@9.0.115-1ubuntu0.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.0.115-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"9.0.95-1ubuntu1",
"9.0.111-1",
"9.0.115-1"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libtomcat11-embed-java",
"binary_version": "11.0.18-1ubuntu0.1~esm1"
},
{
"binary_name": "libtomcat11-java",
"binary_version": "11.0.18-1ubuntu0.1~esm1"
},
{
"binary_name": "tomcat11",
"binary_version": "11.0.18-1ubuntu0.1~esm1"
},
{
"binary_name": "tomcat11-admin",
"binary_version": "11.0.18-1ubuntu0.1~esm1"
},
{
"binary_name": "tomcat11-common",
"binary_version": "11.0.18-1ubuntu0.1~esm1"
},
{
"binary_name": "tomcat11-docs",
"binary_version": "11.0.18-1ubuntu0.1~esm1"
},
{
"binary_name": "tomcat11-examples",
"binary_version": "11.0.18-1ubuntu0.1~esm1"
},
{
"binary_name": "tomcat11-user",
"binary_version": "11.0.18-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "tomcat11",
"purl": "pkg:deb/ubuntu/tomcat11@11.0.18-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "11.0.18-1ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"11.0.6-1",
"11.0.11-1",
"11.0.15-1",
"11.0.18-1"
]
}
],
"aliases": [],
"details": "Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.",
"id": "UBUNTU-CVE-2026-42498",
"modified": "2026-06-18T20:07:39Z",
"published": "2026-05-12T16:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-42498"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42498"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8417-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8450-1"
}
],
"related": [
"USN-8417-1",
"USN-8450-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-42498"
]
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…