High
Security advisory
Apache HTTP Server, in all releases prior to 2.2.32 and 2.4.25, was liberal in the whitespace accepted from requests and sent in response lines and headers. Accepting these different behaviors represented a security concern when httpd participates in any chain of proxies or interacts with back-end application servers, either through mod_proxy or using conventional CGI mechanisms, and may result in request smuggling, response splitting and cache pollution.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-8743
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:15 UTC · Revision 1
Source evidence
Apache HTTP Server, in all releases prior to 2.2.32 and 2.4.25, was liberal in the whitespace accepted from requests and sent in response lines and headers. Accepting these different behaviors represented a security concern when httpd participates in any chain of proxies or interacts with back-end application servers, either through mod_proxy or using conventional CGI mechanisms, and may result in request smuggling, response splitting and cache pollution.
osv:CVE-2016-8743
Complete source record
{
"id": "dcca6e9cfab8f8b6e2362d6d70204b4a6938018109df3f4b029e82b8dfcac174",
"url": "https://osv.dev/vulnerability/CVE-2016-8743",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-8743",
"summary": "Apache HTTP Server, in all releases prior to 2.2.32 and 2.4.25, was liberal in the whitespace accepted from requests and sent in response lines and headers. Accepting these different behaviors represented a security concern when httpd participates in any chain of proxies or interacts with back-end application servers, either through mod_proxy or using conventional CGI mechanisms, and may result in request smuggling, response splitting and cache pollution.",
"evidence": "osv:CVE-2016-8743",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2016-8743",
"aliases": [
"CVE-2016-8743"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/apache/httpd",
"type": "GIT",
"events": [
{
"introduced": "cd3e5a83cd5765d12b3237631c829eaff80f8425"
},
{
"last_affected": "79f35160c372de1e867542e1705962fb0880a647"
},
{
"introduced": "60fa04727910859b5512f7bbb36c53c4652cff2c"
},
{
"last_affected": "ef07cb031c6f8f7ac483c26fc858aad68c365fd9"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.2.0"
},
{
"last_affected": "2.2.31"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.1"
},
{
"last_affected": "2.4.23"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-8743.json"
}
}
],
"modified": "2026-10-24T10:30:26.297328560Z",
"provider": "osv",
"references": [
"https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r09b8a39d1262adbab5528eea73df1b1f93e919bf004ed5a843d9cad1%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r4fe84db67fe9dc906c6185e58bbd9913f4356dd555a5c3db490694e5%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r6521a7f62276340eabdb3339b2aa9a38c5f59d978497a1f794af53be%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r94284b139540e5287ebdd3450682d3e3d187263dd6b75af8fa7d4890%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E",
"https://lists.apache.org/thread.html/rfcb6c7b9e7ca727a7eeeb5f13f89488a03981cfa0e7c3125f18fa239%40%3Ccvs.httpd.apache.org%3E",
"https://access.redhat.com/errata/RHSA-2017:0906",
"https://access.redhat.com/errata/RHSA-2017:1161",
"https://access.redhat.com/errata/RHSA-2017:1413",
"https://access.redhat.com/errata/RHSA-2017:1414",
"https://access.redhat.com/errata/RHSA-2017:1721",
"https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbmu03753en_us",
"https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03725en_us",
"https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-8743",
"https://security.netapp.com/advisory/ntap-20180423-0001/",
"https://support.apple.com/HT208221",
"https://www.tenable.com/security/tns-2017-04",
"https://security.gentoo.org/glsa/201701-36"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
},
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_desktop",
"extracted_events": [
{
"range": [
{
"introduced": "6.0"
},
{
"last_affected": "6.0"
},
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_eus:7.3:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:*"
],
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"extracted_events": [
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"introduced": "7.3"
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{
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{
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{
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{
"introduced": "7.5"
},
{
"last_affected": "7.5"
},
{
"introduced": "7.6"
},
{
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{
"introduced": "7.7"
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{
"last_affected": "7.7"
}
],
"source": "CPE_STRING"
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]
},
{
"cpes": [
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"cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server",
"extracted_events": [
{
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],
"source": "CPE_STRING"
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]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:*"
],
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{
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"introduced": "7.3"
},
{
"last_affected": "7.3"
},
{
"introduced": "7.4"
},
{
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{
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{
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{
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{
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],
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]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server_tus",
"extracted_events": [
{
"range": [
{
"introduced": "7.3"
},
{
"last_affected": "7.3"
},
{
"introduced": "7.6"
},
{
"last_affected": "7.6"
},
{
"introduced": "7.7"
},
{
"last_affected": "7.7"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_workstation",
"extracted_events": [
{
"range": [
{
"introduced": "6.0"
},
{
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{
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},
{
"last_affected": "7.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:a:redhat:jboss_core_services:1.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:jboss_core_services",
"extracted_events": [
{
"range": [
{
"introduced": "1.0"
},
{
"last_affected": "1.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2016-8743",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 431587,
"published_at": "2017-07-27T21:29:00.287+00:00"
}