USN-8655-1

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Source
https://ubuntu.com/security/notices/USN-8655-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8655-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8655-1
Upstream
Related
Published
2026-08-20T17:57:45Z
Modified
2026-08-26T22:58:00.266288390Z
Summary
async-http-client vulnerability
Details

It was discovered that AsyncHttpClient did not properly verify that the responding host was allowed to set cookies for a given domain in its ThreadSafeCookieStore. An attacker could use this to plant cookies scoped to unrelated domains, which would then be sent on later requests to those domains.

References

Affected packages

Ubuntu:Pro:20.04:LTS / async-http-client

Package

Name
async-http-client
Purl
pkg:deb/ubuntu/async-http-client?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.6.0-1ubuntu0.1~esm1

Affected versions

2.*
2.6.0-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "2.6.0-1ubuntu0.1~esm1",
            "binary_name": "libasync-http-client-java"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-55688"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8655-1.json"

Ubuntu:22.04:LTS / async-http-client

Package

Name
async-http-client
Purl
pkg:deb/ubuntu/async-http-client?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.12.3-1ubuntu0.22.04.1

Affected versions

2.*
2.12.2-1
2.12.3-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.12.3-1ubuntu0.22.04.1",
            "binary_name": "libasync-http-client-java"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-55688"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8655-1.json"

Ubuntu:24.04:LTS / async-http-client

Package

Name
async-http-client
Purl
pkg:deb/ubuntu/async-http-client?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.12.3-1ubuntu0.24.04.1

Affected versions

2.*
2.12.3-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.12.3-1ubuntu0.24.04.1",
            "binary_name": "libasync-http-client-java"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-55688"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8655-1.json"

Ubuntu:26.04:LTS / async-http-client

Package

Name
async-http-client
Purl
pkg:deb/ubuntu/async-http-client?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.12.3-1ubuntu1.1

Affected versions

2.*
2.12.3-1
2.12.3-1ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.12.3-1ubuntu1.1",
            "binary_name": "libasync-http-client-java"
        }
    ]
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:26.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-55688"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8655-1.json"