HighFix available
apache2 — security advisory
A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool (heap) memory location beyond the header value sent. This could cause the process to crash. This issue affects Apache HTTP Server 2.4.54 and earlier.
- Products
- apache2
- Affected versions
- Not specified
- Fixed versions
- 2.4.55-r0
- CVEs
- CVE-2006-20001
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 19:26 UTC · Revision 1
Source evidence
A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool (heap) memory location beyond the header value sent. This could cause the process to crash. This issue affects Apache HTTP Server 2.4.54 and earlier.
osv:ALPINE-CVE-2006-20001
apache2
Fixed versions: 2.4.55-r0
apache2
Fixed versions: 2.4.55-r0
apache2
Fixed versions: 2.4.55-r0
apache2
Fixed versions: 2.4.55-r0
Complete source record
{
"id": "258883e1eba565b865a69c4ff2dfc2c5711c1546c51dd02977890b9b7378089f",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2006-20001",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2006-20001",
"summary": "A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool (heap) memory location beyond the header value sent. This could cause the process to crash. This issue affects Apache HTTP Server 2.4.54 and earlier.",
"evidence": "osv:ALPINE-CVE-2006-20001",
"products": [
{
"name": {
"value": "apache2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.55-r0",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
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},
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{
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],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "ALPINE-CVE-2006-20001",
"aliases": [
"ALPINE-CVE-2006-20001"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
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{
"fixed": "2.4.55-r0"
}
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],
"package": {
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"purl": "pkg:apk/alpine/apache2?arch=source",
"ecosystem": "Alpine:v3.14"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2006-20001.json"
},
"ecosystem_specific": {}
},
{
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"package": {
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"purl": "pkg:apk/alpine/apache2?arch=source",
"ecosystem": "Alpine:v3.15"
},
"database_specific": {
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{
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],
"package": {
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"purl": "pkg:apk/alpine/apache2?arch=source",
"ecosystem": "Alpine:v3.16"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2006-20001.json"
},
"ecosystem_specific": {}
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{
"ranges": [
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],
"package": {
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"purl": "pkg:apk/alpine/apache2?arch=source",
"ecosystem": "Alpine:v3.17"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2006-20001.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-22T23:17:45.201044642Z",
"provider": "osv",
"upstream": [
"CVE-2006-20001"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2006-20001"
]
},
"related_cves": [
{
"value": "CVE-2006-20001",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 410062,
"published_at": "2023-01-17T20:15:11.177+00:00"
}