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                {
                    "defaultStatus": "unaffected",
                    "product": "Apache HTTP Server",
                    "vendor": "Apache Software Foundation",
                    "versions": [
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                            "lessThanOrEqual": "2.4.66",
                            "status": "affected",
                            "version": "2.4.0",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Haruki Oyama (Waseda University)"
                },
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Merih Mengisteab"
                },
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Dawit Jeong"
                }
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                            "value": "<p>HTTP response splitting vulnerability in multiple Apache HTTP Server modules with untrusted or compromised backend servers.</p><p>This issue affects Apache HTTP Server: from through 2.4.66.</p><p>Users are recommended to upgrade to version 2.4.67, which fixes the issue.</p>"
                        }
                    ],
                    "value": "HTTP response splitting vulnerability in multiple Apache HTTP Server modules with untrusted or compromised backend servers.\n\nThis issue affects Apache HTTP Server: from through 2.4.66.\n\nUsers are recommended to upgrade to version 2.4.67, which fixes the issue."
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            ],
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                            "cweId": "CWE-443",
                            "description": "CWE-443: HTTP response splitting",
                            "lang": "en",
                            "type": "CWE"
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                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09"
            },
            "source": {
                "discovery": "UNKNOWN"
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                {
                    "lang": "en",
                    "time": "2026-03-05T12:00:00.000Z",
                    "value": "reported"
                },
                {
                    "lang": "eng",
                    "time": "2026-05-04",
                    "value": "2.4.67 released"
                },
                {
                    "lang": "en",
                    "time": "2026-05-04T12:00:00.000Z",
                    "value": "fixed in 2.4.x by r1933360"
                }
            ],
            "title": "multiple modules: HTTP response splitting forwarding malicious status line",
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                    "tags": [
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                    ],
                    "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
                }
            ]
        }
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    "cveMetadata": {
        "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "cveId": "CVE-2026-33523",
        "serial": 1,
        "state": "PUBLISHED"
    },
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    "dataVersion": "5.1",
    "CNA_private": {
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        "projecturl": null,
        "owner": "httpd",
        "state": "RESERVED",
        "todo": [],
        "type": "unsure"
    }
}