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CVE-2026-39821

🗓️ 22 May 2026 15:01:21Reported by GoType 
cve
 cve
🔗 web.nvd.nist.gov👁 496 Views

ToUnicode accepts punycode labels that decode to ASCII, enabling privilege escalation in the idna package.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
osv
OSV
MINI-8XG7-586W-489H
8 Jun 202616:44
osv
osv
OSV
MINI-8XW5-7Q5Q-697V
4 Jun 202612:19
osv
osv
OSV
MINI-8XWV-C75P-XJ5H
4 Jun 202609:35
osv
osv
OSV
MINI-9249-W8GC-8HQH
23 Jun 202623:17
osv
osv
OSV
MINI-92V9-7XQ5-94PF
12 Jul 202619:15
osv
osv
OSV
MINI-934W-4MGC-X6H6
18 Jun 202604:03
osv
osv
OSV
MINI-9356-M3V8-XXV2
9 Jun 202610:51
osv
osv
OSV
MINI-935P-PR47-M6MG
28 Jun 202616:27
osv
osv
OSV
MINI-94VM-7VVJ-RV7Q
7 Jun 202610:41
osv
osv
OSV
MINI-9539-6296-9QGM
7 Jun 202619:24
osv
Rows per page
NVD
Node
golangnetRange<0.55.0go
[
  {
    "vendor": "golang.org/x/net",
    "product": "golang.org/x/net/idna",
    "collectionURL": "https://pkg.go.dev",
    "packageName": "golang.org/x/net/idna",
    "versions": [
      {
        "version": "0",
        "lessThan": "0.55.0",
        "status": "affected",
        "versionType": "semver"
      }
    ],
    "programRoutines": [
      {
        "name": "Profile.process"
      },
      {
        "name": "Profile.ToASCII"
      },
      {
        "name": "Profile.ToUnicode"
      },
      {
        "name": "ToASCII"
      },
      {
        "name": "ToUnicode"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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29 Jul 2026 13:18Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.19.6
EPSS0.00655
SSVC
496