UBUNTU-CVE-2026-85718 (CVE-2026-85718)
Vulnerability from osv_ubuntu – Published: 2026-09-17 16:18 – Updated: 2026-09-23 23:36 – Source website
VLAI
Details
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 3.0.8 until 3.0.12, a client with maxConnections or maxConnectionsPerHost set above zero leaks one connection permit whenever TLS connection establishment fails before the handshake completes. NettyConnectListener removes the partitionKeyLock permit from NettyResponseFuture before every failure path is bound to the channel closeFuture, so an abort can leave the permit unreleased. Repeated failures can permanently lock out one host under a per-host limit or drain the shared pool under a global limit, blocking later requests even when no connection remains open. The default unlimited connection setting is not affected. This issue is fixed in version 3.0.12.
Severity
5.9 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libasync-http-client-java",
"binary_version": "1.6.5-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "async-http-client",
"purl": "pkg:deb/ubuntu/async-http-client@1.6.5-2ubuntu0.1~esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.5-1",
"1.6.5-2",
"1.6.5-2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libasync-http-client-java",
"binary_version": "1.6.5-4"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "async-http-client",
"purl": "pkg:deb/ubuntu/async-http-client@1.6.5-4?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.5-4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libasync-http-client-java",
"binary_version": "1.6.5-5"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "async-http-client",
"purl": "pkg:deb/ubuntu/async-http-client@1.6.5-5?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.5-4",
"1.6.5-5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libasync-http-client-java",
"binary_version": "2.6.0-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "async-http-client",
"purl": "pkg:deb/ubuntu/async-http-client@2.6.0-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.6.0-1",
"2.6.0-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libasync-http-client-java",
"binary_version": "2.12.3-1ubuntu0.22.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "async-http-client",
"purl": "pkg:deb/ubuntu/async-http-client@2.12.3-1ubuntu0.22.04.1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.12.2-1",
"2.12.3-1",
"2.12.3-1ubuntu0.22.04.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libasync-http-client-java",
"binary_version": "2.12.3-1ubuntu0.24.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "async-http-client",
"purl": "pkg:deb/ubuntu/async-http-client@2.12.3-1ubuntu0.24.04.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.12.3-1",
"2.12.3-1ubuntu0.24.04.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libasync-http-client-java",
"binary_version": "2.12.3-1ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "async-http-client",
"purl": "pkg:deb/ubuntu/async-http-client@2.12.3-1ubuntu1.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.12.3-1",
"2.12.3-1ubuntu1",
"2.12.3-1ubuntu1.1"
]
}
],
"aliases": [],
"details": "The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 3.0.8 until 3.0.12, a client with maxConnections or maxConnectionsPerHost set above zero leaks one connection permit whenever TLS connection establishment fails before the handshake completes. NettyConnectListener removes the partitionKeyLock permit from NettyResponseFuture before every failure path is bound to the channel closeFuture, so an abort can leave the permit unreleased. Repeated failures can permanently lock out one host under a per-host limit or drain the shared pool under a global limit, blocking later requests even when no connection remains open. The default unlimited connection setting is not affected. This issue is fixed in version 3.0.12.",
"id": "UBUNTU-CVE-2026-85718",
"modified": "2026-09-23T23:36:45Z",
"published": "2026-09-17T16:18:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-85718"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-85718"
},
{
"type": "REPORT",
"url": "https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-gcmv-gr82-6m8v"
},
{
"type": "REPORT",
"url": "https://github.com/AsyncHttpClient/async-http-client/issues/2189"
},
{
"type": "REPORT",
"url": "https://github.com/AsyncHttpClient/async-http-client/pull/2288"
},
{
"type": "REPORT",
"url": "https://github.com/AsyncHttpClient/async-http-client/commit/64eb57af52a003ae7f29a2f9f4502271bbb138dd"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-85718"
]
}
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Sightings
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Nomenclature
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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