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CVE-2025-0938

Published: Jan 31, 2025

Modified: Apr 21, 2026

PUBLISHED

Description

The Python standard library functions `urllib.parse.urlsplit` and `urlparse` accepted domain names that included square brackets which isn't valid according to RFC 3986. Square brackets are only meant to be used as delimiters for specifying IPv6 and IPvFuture hosts in URLs. This could result in differential parsing across the Python URL parser and other specification-compliant URL parsers.

Vendor	Product	Versions
Python Software Foundation	CPython	affected `0 - < 3.10.17` affected `3.11.0 - < 3.11.12` affected `3.12.0 - < 3.12.9` affected `3.13.0 - < 3.13.2` affected `3.14.0a1 - < 3.14.0a5`

Weaknesses (CWE)

References

https://github.com/python/cpython/issues/105704

issue-tracking

https://github.com/python/cpython/pull/129418

patch

https://mail.python.org/archives/list/[email protected]/thread/K4EUG6EKV6JYFIC24BASYOZS4M5XOQIB/

vendor-advisory

https://github.com/python/cpython/commit/d89a5f6a6e65511a5f6e0618c4c30a7aa5aba56a

patch

https://github.com/python/cpython/commit/90e526ae67b172ed7c6c56e7edad36263b0f9403

patch

https://github.com/python/cpython/commit/a7084f6075c9595ba60119ce8c62f1496f50c568

patch

https://github.com/python/cpython/commit/526617ed68cde460236c973e5d0a8bad4de896ba

patch

https://github.com/python/cpython/commit/b8b4b713c5f8ec0958c7ef8d29d6711889bc94ab

patch

https://github.com/python/cpython/commit/ff4e5c25666f63544071a6b075ae8b25c98b7a32

patch

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