Low
Security advisory
Bidirectional Unicode text can be interpreted and compiled differently than how it appears in editors which can be exploited to get nefarious code passed a code review by appearing benign. An attacker could embed a source that is invisible to a code reviewer that modifies the behavior of a program in unexpected ways.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-22567
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:39 UTC · Revision 1
Source evidence
Bidirectional Unicode text can be interpreted and compiled differently than how it appears in editors which can be exploited to get nefarious code passed a code review by appearing benign. An attacker could embed a source that is invisible to a code reviewer that modifies the behavior of a program in unexpected ways.
osv:CVE-2021-22567
Complete source record
{
"id": "84c61e43eaf3614e2d7bbb488cead2fdd2eecda0dfcd020373443c8c7b163808",
"url": "https://osv.dev/vulnerability/CVE-2021-22567",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-22567",
"summary": "Bidirectional Unicode text can be interpreted and compiled differently than how it appears in editors which can be exploited to get nefarious code passed a code review by appearing benign. An attacker could embed a source that is invisible to a code reviewer that modifies the behavior of a program in unexpected ways.",
"evidence": "osv:CVE-2021-22567",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2021-22567",
"aliases": [
"CVE-2021-22567"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/dart-lang/sdk",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "3d2629cd0310df74bdf260d828ed3c75f25db889"
},
{
"fixed": "52519ea8eb4780c468c4c2ed00e7c8046ccfed41"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:dart:dart_software_development_kit:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.15.0"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "52519ea8eb4780c468c4c2ed00e7c8046ccfed41"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22567.json"
}
}
],
"modified": "2026-10-20T10:54:31.082688205Z",
"provider": "osv",
"references": [
"https://github.com/dart-lang/sdk/blob/main/CHANGELOG.md",
"https://github.com/dart-lang/sdk/commit/52519ea8eb4780c468c4c2ed00e7c8046ccfed41"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-22567",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 385476,
"published_at": "2022-01-05T11:15:08.12+00:00"
}