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CVE-2026-45409 Internationalized Domain Names in Applications (IDNA): Specially crafted inputs to idna.encode() can bypass CVE-2024-3651 fix

🗓️ 05 Jun 2026 22:06:07Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 24 Views

IDNA Python: crafted idna.encode inputs may cause DoS; fix via pre-validation and 253 character limit.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-45409
5 Jun 202622:06
attackerkb
Chainguard
CVE-2026-45409 vulnerabilities
21 May 202601:17
cgr
Circl
CVE-2026-45409
25 May 202602:03
circl
CVE
CVE-2026-45409
5 Jun 202622:06
cve
Debian CVE
CVE-2026-45409
5 Jun 202622:06
debiancve
EUVD
EUVD-2026-34921
5 Jun 202622:06
euvd
Github Security Blog
Internationalized Domain Names in Applications (IDNA): Specially crafted inputs to idna.encode() can bypass CVE-2024-3651 fix
19 May 202614:34
github
NVD
CVE-2026-45409
5 Jun 202623:16
nvd
OSV
CGA-WHRG-4C86-4MH8
20 May 202623:43
osv
OSV
DEBIAN-CVE-2026-45409
5 Jun 202623:16
osv
Rows per page
[
  {
    "vendor": "kjd",
    "product": "idna",
    "versions": [
      {
        "version": "< 3.15",
        "status": "affected"
      }
    ]
  }
]

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