CVE-2026-64607

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Source
https://cve.org/CVERecord?id=CVE-2026-64607
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64607.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-64607
Aliases
Downstream
Related
Published
2026-07-31T10:12:18.035Z
Modified
2026-08-15T11:31:03.828353566Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
Apache HttpComponents Client: Connection Leak on Content-Encoding Decode Error Leads to Pool Exhaustion DoS
Details

HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported Content-Encoding header value in the response message. Please note this defect does not affect HttpClient based on the async i/o model.

This issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.

Database specific 
{
    "cwe_ids": [
        "CWE-772"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64607.json",
    "cna_assigner": "apache",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "5.0-alpha"
                },
                {
                    "last_affected": "5.6.2"
                }
            ],
            "source": "AFFECTED_FIELD"
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "5.0-alpha1"
                },
                {
                    "fixed": "5.6.2"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/apache/httpcomponents-client

Affected ranges

Type
GIT
Repo
https://github.com/apache/httpcomponents-client
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
13408e3f33dfc3763c44fe96e0d00fa6f6ecc65d
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:apache:httpclient:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "5.0.0"
        },
        {
            "fixed": "5.6.3"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

5.*
5.0-alpha3-RC1
5.0-beta1-RC1
5.0-beta2-RC1
5.0-beta3-RC1
5.0-beta4-RC1
5.6-RC2
5.6-alpha1-RC1
rel/v5.*
rel/v5.0-alpha3
rel/v5.0-beta1
rel/v5.0-beta2
rel/v5.0-beta3
rel/v5.0-beta4
rel/v5.6-alpha1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64607.json"