Critical
Security advisory
Off-by-one Error in GitHub repository v2fly/v2ray-core prior to 4.44.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-4070
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:56 UTC · Revision 1
Source evidence
Off-by-one Error in GitHub repository v2fly/v2ray-core prior to 4.44.0.
osv:CVE-2021-4070
Complete source record
{
"id": "38c63f66ecd45f91dbc00306bbfd53b7be6dfceac58ecf966880ab24e3fe0909",
"url": "https://osv.dev/vulnerability/CVE-2021-4070",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-4070",
"summary": "Off-by-one Error in GitHub repository v2fly/v2ray-core prior to 4.44.0.",
"evidence": "osv:CVE-2021-4070",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2021-4070",
"aliases": [
"CVE-2021-4070",
"GHSA-4cxw-hq44-r344",
"GO-2022-0550"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/v2fly/v2ray-core",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "9936afaa49b515fd5ecd9c8968f7c792bd67ae05"
},
{
"fixed": "c1af2bfd7aa59a4482aa7f6ec4b9208c1d350b5c"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:v2fly:v2ray-core:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.44.0"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "c1af2bfd7aa59a4482aa7f6ec4b9208c1d350b5c"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4070.json"
}
}
],
"modified": "2026-10-20T10:54:57.928501575Z",
"provider": "osv",
"references": [
"https://github.com/v2fly/v2ray-core/commit/c1af2bfd7aa59a4482aa7f6ec4b9208c1d350b5c",
"https://huntr.dev/bounties/8da19456-4d89-41ef-9781-a41efd6a1877"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-4070",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 386570,
"published_at": "2022-02-23T20:15:09.167+00:00"
}