Critical
Security advisory
A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-44790
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:09 UTC · Revision 1
Source evidence
A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.
osv:CVE-2021-44790
Complete source record
{
"id": "cdab61c0b8cbb6dc318f6aa2110a7966f297825941dd364a2cf439b10caa318d",
"url": "https://osv.dev/vulnerability/CVE-2021-44790",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-44790",
"summary": "A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.",
"evidence": "osv:CVE-2021-44790",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2021-44790",
"aliases": [
"BIT-apache-2021-44790",
"CVE-2021-44790"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apache/httpd",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "fed3b8a079835cd63648d8903bc69243ce2c472a"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.4.52"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"candidate-2.4.52-rc1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44790.json"
}
}
],
"modified": "2026-10-24T10:31:03.700929949Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFSWOH4X77CV7AH7C4RMHUBDWKQDL4YH/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/",
"https://security.gentoo.org/glsa/202208-20",
"https://security.netapp.com/advisory/ntap-20211224-0001/",
"https://support.apple.com/kb/HT213255",
"https://support.apple.com/kb/HT213256",
"https://support.apple.com/kb/HT213257",
"https://www.debian.org/security/2022/dsa-5035",
"https://www.tenable.com/security/tns-2022-01",
"https://www.tenable.com/security/tns-2022-03",
"https://www.oracle.com/security-alerts/cpuapr2022.html",
"https://www.oracle.com/security-alerts/cpujan2022.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*"
],
"vendor_product": "apple:macos",
"extracted_events": [
{
"range": [
{
"fixed": "10.15.7"
},
{
"introduced": "11.0"
},
{
"fixed": "11.6.6"
},
{
"introduced": "12.0"
},
{
"fixed": "12.4"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:communications_element_manager:*:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:communications_element_manager",
"extracted_events": [
{
"range": [
{
"last_affected": "9.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:communications_session_report_manager",
"extracted_events": [
{
"range": [
{
"last_affected": "9.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:communications_session_route_manager:*:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:communications_session_route_manager",
"extracted_events": [
{
"range": [
{
"last_affected": "9.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*"
],
"vendor_product": "tenable:tenable.sc",
"extracted_events": [
{
"range": [
{
"introduced": "5.16.0"
},
{
"fixed": "5.20.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-005:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-007:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-008:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-001:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-002:*:*:*:*:*:*",
"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-003:*:*:*:*:*:*"
],
"vendor_product": "apple:mac_os_x",
"extracted_events": [
{
"range": [
{
"introduced": "10.15.7-security_update_2020\\-001"
},
{
"last_affected": "10.15.7-security_update_2020\\-001"
},
{
"introduced": "10.15.7-security_update_2021\\-001"
},
{
"last_affected": "10.15.7-security_update_2021\\-001"
},
{
"introduced": "10.15.7-security_update_2021\\-002"
},
{
"last_affected": "10.15.7-security_update_2021\\-002"
},
{
"introduced": "10.15.7-security_update_2021\\-003"
},
{
"last_affected": "10.15.7-security_update_2021\\-003"
},
{
"introduced": "10.15.7-security_update_2021\\-004"
},
{
"last_affected": "10.15.7-security_update_2021\\-004"
},
{
"introduced": "10.15.7-security_update_2021\\-005"
},
{
"last_affected": "10.15.7-security_update_2021\\-005"
},
{
"introduced": "10.15.7-security_update_2021\\-006"
},
{
"last_affected": "10.15.7-security_update_2021\\-006"
},
{
"introduced": "10.15.7-security_update_2021\\-007"
},
{
"last_affected": "10.15.7-security_update_2021\\-007"
},
{
"introduced": "10.15.7-security_update_2021\\-008"
},
{
"last_affected": "10.15.7-security_update_2021\\-008"
},
{
"introduced": "10.15.7-security_update_2022\\-001"
},
{
"last_affected": "10.15.7-security_update_2022\\-001"
},
{
"introduced": "10.15.7-security_update_2022\\-002"
},
{
"last_affected": "10.15.7-security_update_2022\\-002"
},
{
"introduced": "10.15.7-security_update_2022\\-003"
},
{
"last_affected": "10.15.7-security_update_2022\\-003"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "10.0"
},
{
"last_affected": "10.0"
},
{
"introduced": "11.0"
},
{
"last_affected": "11.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "34"
},
{
"last_affected": "34"
},
{
"introduced": "35"
},
{
"last_affected": "35"
},
{
"introduced": "36"
},
{
"last_affected": "36"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:communications_operations_monitor:4.3:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:communications_operations_monitor:4.4:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:communications_operations_monitor:5.0:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:communications_operations_monitor",
"extracted_events": [
{
"range": [
{
"introduced": "4.3"
},
{
"last_affected": "4.3"
},
{
"introduced": "4.4"
},
{
"last_affected": "4.4"
},
{
"introduced": "5.0"
},
{
"last_affected": "5.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:http_server",
"extracted_events": [
{
"range": [
{
"introduced": "12.2.1.3.0"
},
{
"last_affected": "12.2.1.3.0"
},
{
"introduced": "12.2.1.4.0"
},
{
"last_affected": "12.2.1.4.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*",
"cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:instantis_enterprisetrack",
"extracted_events": [
{
"range": [
{
"introduced": "17.1"
},
{
"last_affected": "17.1"
},
{
"introduced": "17.2"
},
{
"last_affected": "17.2"
},
{
"introduced": "17.3"
},
{
"last_affected": "17.3"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:zfs_storage_appliance_kit",
"extracted_events": [
{
"range": [
{
"introduced": "8.8"
},
{
"last_affected": "8.8"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-44790",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 440317,
"published_at": "2021-12-20T12:15:07.44+00:00"
}