CVE-2026-54428

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Source
https://cve.org/CVERecord?id=CVE-2026-54428
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54428.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54428
Downstream
Published
2026-07-01T17:03:53.938Z
Modified
2026-07-08T08:12:35.861387517Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK
Details

Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "5.5-alpha"
                },
                {
                    "last_affected": "5.5-beta1"
                },
                {
                    "introduced": "5.0-alpha"
                },
                {
                    "last_affected": "5.4.2"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54428.json",
    "cna_assigner": "apache",
    "cwe_ids": [
        "CWE-400",
        "CWE-770"
    ]
}
References

Affected packages

Git / github.com/apache/httpcomponents-core

Affected ranges

Type
GIT
Repo
https://github.com/apache/httpcomponents-core
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
4ee5b2a75b847f9f82a3bfec4524c2cb4f4fb3a6
Introduced
75f51152de1bc5b05dc5576d07c0bec96a5d9bcc
Last affected
fe165c869e50356c677b319c4ebf32d656352be3
Database specific 
{
    "source": [
        "CPE_RANGE",
        "CPE_STRING"
    ],
    "cpe": [
        "cpe:2.3:a:apache:httpcomponents_core:*:*:*:*:*:*:*:*",
        "cpe:2.3:a:apache:httpcomponents_core:5.5:alpha1:*:*:*:*:*:*",
        "cpe:2.3:a:apache:httpcomponents_core:5.5:beta1:*:*:*:*:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "5.4.2"
        },
        {
            "introduced": "5.5-alpha1"
        },
        {
            "last_affected": "5.5-alpha1"
        },
        {
            "introduced": "5.5-beta1"
        },
        {
            "last_affected": "5.5-beta1"
        }
    ]
}

Affected versions

5.*
5.0-alpha4-RC1
5.0-beta1-RC1
5.0-beta2-RC1
5.0-beta3-RC1
5.0-beta4-RC1
5.0-beta5-RC2
5.0-beta6-RC1
5.4-alpha1-RC1
5.4.2-RC1
5.5-alpha1
5.5-beta1
5.5-beta1-RC1
rel/v5.*
rel/v5.0-alpha4
rel/v5.0-beta1
rel/v5.0-beta2
rel/v5.0-beta3
rel/v5.0-beta4
rel/v5.0-beta5
rel/v5.0-beta6
rel/v5.4-alpha1
rel/v5.4.2
rel/v5.5-beta1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54428.json"