Medium
Security advisory
net/http in Go before 1.15.12 and 1.16.x before 1.16.4 allows remote attackers to cause a denial of service (panic) via a large header to ReadRequest or ReadResponse. Server, Transport, and Client can each be affected in some configurations.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-31525
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:45 UTC · Revision 1
Source evidence
net/http in Go before 1.15.12 and 1.16.x before 1.16.4 allows remote attackers to cause a denial of service (panic) via a large header to ReadRequest or ReadResponse. Server, Transport, and Client can each be affected in some configurations.
osv:CVE-2021-31525
Complete source record
{
"id": "d2caa7822fcd2dcc042149b0726daad44e3b2b44831f2143a43ab592610f788b",
"url": "https://osv.dev/vulnerability/CVE-2021-31525",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-31525",
"summary": "net/http in Go before 1.15.12 and 1.16.x before 1.16.4 allows remote attackers to cause a denial of service (panic) via a large header to ReadRequest or ReadResponse. Server, Transport, and Client can each be affected in some configurations.",
"evidence": "osv:CVE-2021-31525",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-31525",
"aliases": [
"BIT-golang-2021-31525",
"CVE-2021-31525",
"GHSA-h86h-8ppg-mxmh",
"GO-2022-0236"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/golang/go",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "07d8cba9e15f5c5a3b0462a9215dbeac0cebf027"
},
{
"fixed": "04cd717a269d94d3b3459a3aaf43bc71e3112b7a"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.15.12"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.16.0"
},
{
"fixed": "1.16.4"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"go1.15.11",
"go1.16.3",
"go1.15.10",
"go1.16.2",
"go1.16",
"go1.15.8",
"go1.16rc1",
"go1.15.6",
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"go1.8beta1",
"go1.7rc4",
"go1.7rc3",
"go1.7rc2",
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"go1.7beta1",
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"go1.6beta1",
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"go1.5beta2",
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"go1.3beta2",
"go1.3beta1",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-31525.json"
}
}
],
"modified": "2026-10-20T10:54:40.255380487Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ISRZZ6NY5R2TBYE72KZFOCO25TEUQTBF/",
"https://groups.google.com/g/golang-announce/c/cu9SP4eSXMc",
"https://security.gentoo.org/glsa/202208-02",
"https://github.com/golang/go/issues/45710"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "34"
},
{
"last_affected": "34"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-31525",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 385842,
"published_at": "2021-05-27T13:15:08.207+00:00"
}