ubuntu-cve-2026-40542
Vulnerability from osv_ubuntu
Published
2026-04-22 08:16
Modified
2026-06-30 16:20
Summary
Details
Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.
Severity
7.3 (High)
7.3 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttpclient-java",
"binary_version": "4.3.3-1ubuntu0.1+esm2"
},
{
"binary_name": "libhttpmime-java",
"binary_version": "4.3.3-1ubuntu0.1+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "httpcomponents-client",
"purl": "pkg:deb/ubuntu/httpcomponents-client@4.3.3-1ubuntu0.1+esm2?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.2.5-2",
"4.3.2-1",
"4.3.3-1",
"4.3.3-1ubuntu0.1",
"4.3.3-1ubuntu0.1+esm1",
"4.3.3-1ubuntu0.1+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttpclient-java",
"binary_version": "4.5.1-1ubuntu0.1~esm1"
},
{
"binary_name": "libhttpmime-java",
"binary_version": "4.5.1-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "httpcomponents-client",
"purl": "pkg:deb/ubuntu/httpcomponents-client@4.5.1-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.4.1-1",
"4.5.1-1",
"4.5.1-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttpclient-java",
"binary_version": "4.5.5-1ubuntu0.1~esm1"
},
{
"binary_name": "libhttpmime-java",
"binary_version": "4.5.5-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "httpcomponents-client",
"purl": "pkg:deb/ubuntu/httpcomponents-client@4.5.5-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.5.3-1",
"4.5.4-1",
"4.5.5-1",
"4.5.5-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttpclient-java",
"binary_version": "4.5.11-1ubuntu0.1~esm1"
},
{
"binary_name": "libhttpmime-java",
"binary_version": "4.5.11-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "httpcomponents-client",
"purl": "pkg:deb/ubuntu/httpcomponents-client@4.5.11-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.5.9-1",
"4.5.10-2",
"4.5.11-1",
"4.5.11-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttpclient-java",
"binary_version": "4.5.13-3"
},
{
"binary_name": "libhttpmime-java",
"binary_version": "4.5.13-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "httpcomponents-client",
"purl": "pkg:deb/ubuntu/httpcomponents-client@4.5.13-3?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.5.13-2",
"4.5.13-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttpclient-java",
"binary_version": "4.5.14-1"
},
{
"binary_name": "libhttpmime-java",
"binary_version": "4.5.14-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "httpcomponents-client",
"purl": "pkg:deb/ubuntu/httpcomponents-client@4.5.14-1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.5.14-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttpclient-java",
"binary_version": "4.5.14-1"
},
{
"binary_name": "libhttpmime-java",
"binary_version": "4.5.14-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "httpcomponents-client",
"purl": "pkg:deb/ubuntu/httpcomponents-client@4.5.14-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.5.14-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttpclient-java",
"binary_version": "4.5.14-1build1"
},
{
"binary_name": "libhttpmime-java",
"binary_version": "4.5.14-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "httpcomponents-client",
"purl": "pkg:deb/ubuntu/httpcomponents-client@4.5.14-1build1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.5.14-1",
"4.5.14-1build1"
]
}
],
"aliases": [],
"details": "Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.",
"id": "UBUNTU-CVE-2026-40542",
"modified": "2026-06-30T16:20:58Z",
"published": "2026-04-22T08:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-40542"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40542"
},
{
"type": "REPORT",
"url": "https://lists.apache.org/thread/tfmgv86xr0z1y096vs3z0y315t1v3o97"
}
],
"related": [],
"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": "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-2026-40542"
]
}
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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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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