UnratedFix available
golang.org/x/net, stdlib — security advisory
This notice tracks CVE-2026-39821 for golang.org/x/net, stdlib. Fixed versions are listed in the package details.
- Products
- golang.org/x/net, stdlib
- Affected versions
- Not specified
- Fixed versions
- 0.55.0
- CVEs
- CVE-2026-39821
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 13:10 UTC · Revision 1
Source evidence
ECHO-aaf7-56f5-63c2
osv:ECHO-aaf7-56f5-63c2
golang.org/x/net
Fixed versions: 0.55.0
stdlib
Fixed versions: 0.55.0
Complete source record
{
"id": "63a5a025ee6544d67a3e59fd27da41931f3ef41553768905e8c628e91fbbaf12",
"url": "https://osv.dev/vulnerability/ECHO-aaf7-56f5-63c2",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ECHO-aaf7-56f5-63c2",
"summary": "ECHO-aaf7-56f5-63c2",
"evidence": "osv:ECHO-aaf7-56f5-63c2",
"products": [
{
"name": {
"value": "golang.org/x/net",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.55.0",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "stdlib",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.55.0",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "ECHO-aaf7-56f5-63c2",
"aliases": [
"ECHO-aaf7-56f5-63c2"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.55.0"
}
]
}
],
"package": {
"name": "golang.org/x/net",
"purl": "pkg:golang/golang.org/x/net",
"ecosystem": "Echo:Go"
},
"database_specific": {
"source": "https://advisory.echohq.com/osv/ECHO-aaf7-56f5-63c2.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.55.0"
}
]
}
],
"package": {
"name": "stdlib",
"purl": "pkg:golang/stdlib",
"ecosystem": "Echo:Go"
},
"database_specific": {
"source": "https://advisory.echohq.com/osv/ECHO-aaf7-56f5-63c2.json"
}
}
],
"modified": "2026-10-10T00:45:06.545334949Z",
"provider": "osv",
"upstream": [
"CVE-2026-39821",
"GHSA-w2q5-6q6x-x959",
"GO-2026-5026"
],
"references": [
"https://advisory.echohq.com/cve/CVE-2026-39821",
"https://go.dev/cl/767220"
]
},
"related_cves": [
{
"value": "CVE-2026-39821",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 124777,
"published_at": "2026-10-07T00:00:24.814+00:00"
}