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VULNERABILITIES

CVE-2026-17084 Details

Description

The "stringprep" module didn't process characters from RFC 3454 tables B.2 or B.3 correctly: the latest Unicode codepoint attributes were used instead of the specified Unicode 3.2.0. This behavior would cause mismatches when processing domain names using IDNA 2003 (the "idna" codec) and the in_table_b2() function of the "stringprep" module. This only affects domain names containing characters that were not previously registered or had their Unicode attributes such as case-folding behavior updated since Unicode 3.2.0.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
http://www.openwall.com/lists/oss-security/2026/08/18/2 CVE
https://github.com/python/cpython/commit/1e54caa096678a38afcabecabb1ff72400dd6bae [email protected]
https://github.com/python/cpython/commit/5181304bcec9cfc3c15311741c9154cdff2e3fd7 [email protected]
https://github.com/python/cpython/commit/7e109d084d55e7eb25837a5f3b47ef9beee547bc [email protected]
https://github.com/python/cpython/commit/c016c2535b74227fddf2cf7334dbfead6c930214 [email protected]

see all 10 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-436Interpretation ConflictCISA-ADP

Affected Products

No affected product data is available for this CVE.

Change History

11 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-17084
NVD Published Date:
Aug 18, 2026
NVD Last Modified:
Sep 10, 2026
Source:
[email protected]
CVE-2026-17084 Details - Not Deferred