CVE-2025-0938

Publication date 31 January 2025

Last updated 19 June 2026

Ubuntu priority

Medium

Why this priority?

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
pypy3 26.10 stonking
Needs evaluation
26.04 LTS resolute
Needs evaluation
25.10 questing Ignored end of life, was needs-triage
25.04 plucky Ignored end of life, was needs-triage
24.10 oracular Ignored end of life, was needs-triage
24.04 LTS noble
Needs evaluation
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Needs evaluation
python2.7 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Fixed in 2.7.18-13ubuntu1.5+esm6
20.04 LTS focal
Fixed in 2.7.18-1~20.04.7+esm7
18.04 LTS bionic
Fixed in 2.7.17-1~18.04ubuntu1.13+esm11
16.04 LTS xenial
Fixed in 2.7.12-1ubuntu0~16.04.18+esm16
14.04 LTS trusty
Fixed in 2.7.6-8ubuntu0.6+esm28
python3.4 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
14.04 LTS trusty
Fixed in 3.4.3-1ubuntu1~14.04.7+esm15
python3.5 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
16.04 LTS xenial
Fixed in 3.5.2-2ubuntu0~16.04.13+esm16
14.04 LTS trusty
Fixed in 3.5.2-2ubuntu0~16.04.4~14.04.1+esm4
python3.6 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Fixed in 3.6.9-1~18.04ubuntu1.13+esm4
python3.7 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Fixed in 3.7.5-2ubuntu1~18.04.2+esm5
python3.8 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Fixed in 3.8.10-0ubuntu1~20.04.16
18.04 LTS bionic
Fixed in 3.8.0-3ubuntu1~18.04.2+esm4
python3.9 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Fixed in 3.9.5-3ubuntu0~20.04.1+esm4
python3.10 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Fixed in 3.10.12-1~22.04.9
20.04 LTS focal Not in release
python3.11 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Fixed in 3.11.0~rc1-1~22.04.1~esm3
20.04 LTS focal Not in release
python3.12 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular
Fixed in 3.12.7-1ubuntu2
24.04 LTS noble
Fixed in 3.12.3-1ubuntu0.5
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
python3.13 26.10 stonking Not in release
26.04 LTS resolute Not in release
25.10 questing
Not affected
25.04 plucky
Not affected
24.10 oracular
Fixed in 3.13.0-1ubuntu0.2
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release

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Notes

mdeslaur

USN-7280-1 states this was fixed in Ubuntu 20.04 LTS, but the fix was incomplete.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
python3.9
python3.11
python3.12
python3.13

Severity score breakdown

CVSS version: CVSS v4.0

Base score 6.3 · Medium

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

References

Related Ubuntu Security Notices (USN)

Other references

Access our resources on patching vulnerabilities