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CVE-2026-17084 stringprep.map_table_b2() deviates from RFC 3454 Table B.2

🗓️ 18 Aug 2026 13:57:31Reported by PSFType 
cvelist
 cvelist
🔗 www.cve.org👁 68 Views

Python stringprep.map_table_b2() uses latest Unicode instead of 3.2.0, breaking IDNA 2003 domain name processing.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cgr
Chainguard
CVE-2026-17084 vulnerabilities
4 Sep 202602:18
cgr
circl
Circl
CVE-2026-17084
18 Aug 202616:39
circl
cve
CVE
CVE-2026-17084
18 Aug 202613:57
cve
debiancve
Debian CVE
CVE-2026-17084
18 Aug 202613:57
debiancve
euvd
EUVD
EUVD-2026-60889
18 Aug 202613:57
euvd
mscve
Microsoft CVE
stringprep.map_table_b2() deviates from RFC 3454 Table B.2
21 Aug 202621:03
mscve
nvd
NVD
CVE-2026-17084
18 Aug 202614:16
nvd
osv
OSV
AZL-96870 CVE-2026-17084 affecting package python3 3.12.9-14
18 Aug 202614:16
osv
osv
OSV
BIT-LIBPYTHON-2026-17084 stringprep.map_table_b2() deviates from RFC 3454 Table B.2
24 Aug 202609:36
osv
osv
OSV
BIT-PYTHON-2026-17084 stringprep.map_table_b2() deviates from RFC 3454 Table B.2
24 Aug 202609:42
osv
Rows per page
[
  {
    "defaultStatus": "unaffected",
    "modules": [
      "stringprep",
      "idna"
    ],
    "product": "CPython",
    "repo": "https://github.com/python/cpython",
    "vendor": "Python Software Foundation",
    "versions": [
      {
        "version": "0",
        "lessThan": "3.15.0rc2",
        "status": "affected",
        "versionType": "python"
      }
    ]
  }
]

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