Home / mailings [USN-8018-1] Python vulnerabilities
Posted on 05 February 2026
Ubuntu Security==========================================================================Ubuntu Security Notice USN-8018-1
February 05, 2026
python3.14, python3.13, python3.12, python3.11, python3.10, python3.9,
python3.8, python3.7, python3.6, python3.5, python3.4 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in Python.
Software Description:
- python3.13: An interactive high-level object-oriented language
- python3.14: An interactive high-level object-oriented language
- python3.12: An interactive high-level object-oriented language
- python3.10: An interactive high-level object-oriented language
- python3.11: An interactive high-level object-oriented language
- python3.8: An interactive high-level object-oriented language
- python3.9: An interactive high-level object-oriented language
- python3.6: An interactive high-level object-oriented language
- python3.7: An interactive high-level object-oriented language
- python3.5: An interactive high-level object-oriented language
- python3.4: An interactive high-level object-oriented language
Details:
Denis Ledoux discovered that Python incorrectly parsed email message
headers. An attacker could possibly use this issue to inject arbitrary
headers into email messages. This issue only affected python3.6, python3.7,
python3.8, python3.9, python3.10, python3.11, python3.12, python3.13, and
python3.14 packages. (CVE-2025-11468)
Jacob Walls, Shai Berger, and Natalia Bidart discovered that Python
inefficiently parsed XML input with quadratic complexity. An attacker could
possibly use this issue to cause a denial of service. (CVE-2025-12084)
It was discovered that Python incorrectly parsed malicious plist files. An
attacker could possibly use this issue to cause Python to use excessive
resources, leading to a denial of service. This issue only affected
python3.5, python3.6, python3.7, python3.8, python3.9, python3.10,
python3.11, python3.12, python3.13, and python3.14 packages.
(CVE-2025-13837)
Omar Hasan discovered that Python incorrectly parsed URL mediatypes. An
attacker could possibly use this issue to inject arbitrary HTTP headers.
(CVE-2025-15282)
Omar Hasan discovered that Python incorrectly parsed malicious IMAP inputs.
An attacker could possibly use this issue to inject arbitrary IMAP
commands. (CVE-2025-15366)
Omar Hasan discovered that Python incorrectly parsed malicious POP3 inputs.
An attacker could possibly use this issue to inject arbitrary POP3
commands. (CVE-2025-15367)
Omar Hasan discovered that Python incorrectly parsed malicious HTTP cookie
headers. An attacker could possibly use this issue to inject arbitrary HTTP
headers. (CVE-2026-0672)
Omar Hasan discovered that Python incorrectly parsed malicious HTTP header
names and values. An attacker could possibly use this issue to inject
arbitrary HTTP headers. (CVE-2026-0865)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 25.10
idle-python3.13 3.13.7-1ubuntu0.3
idle-python3.14 3.14.0-1ubuntu0.2
libpython3.13 3.13.7-1ubuntu0.3
libpython3.13-dev 3.13.7-1ubuntu0.3
libpython3.13-minimal 3.13.7-1ubuntu0.3
libpython3.13-stdlib 3.13.7-1ubuntu0.3
libpython3.13-testsuite 3.13.7-1ubuntu0.3
libpython3.14 3.14.0-1ubuntu0.2
libpython3.14-dev 3.14.0-1ubuntu0.2
libpython3.14-minimal 3.14.0-1ubuntu0.2
libpython3.14-stdlib 3.14.0-1ubuntu0.2
libpython3.14-testsuite 3.14.0-1ubuntu0.2
python3.13 3.13.7-1ubuntu0.3
python3.13-dev 3.13.7-1ubuntu0.3
python3.13-doc 3.13.7-1ubuntu0.3
python3.13-examples 3.13.7-1ubuntu0.3
python3.13-full 3.13.7-1ubuntu0.3
python3.13-gdbm 3.13.7-1ubuntu0.3
python3.13-minimal 3.13.7-1ubuntu0.3
python3.13-nopie 3.13.7-1ubuntu0.3
python3.13-tk 3.13.7-1ubuntu0.3
python3.13-venv 3.13.7-1ubuntu0.3
python3.14 3.14.0-1ubuntu0.2
python3.14-dev 3.14.0-1ubuntu0.2
python3.14-doc 3.14.0-1ubuntu0.2
python3.14-examples 3.14.0-1ubuntu0.2
python3.14-full 3.14.0-1ubuntu0.2
python3.14-gdbm 3.14.0-1ubuntu0.2
python3.14-minimal 3.14.0-1ubuntu0.2
python3.14-nopie 3.14.0-1ubuntu0.2
python3.14-tk 3.14.0-1ubuntu0.2
python3.14-venv 3.14.0-1ubuntu0.2
Ubuntu 24.04 LTS
idle-python3.12 3.12.3-1ubuntu0.11
libpython3.12-dev 3.12.3-1ubuntu0.11
libpython3.12-minimal 3.12.3-1ubuntu0.11
libpython3.12-stdlib 3.12.3-1ubuntu0.11
libpython3.12-testsuite 3.12.3-1ubuntu0.11
libpython3.12t64 3.12.3-1ubuntu0.11
python3.12 3.12.3-1ubuntu0.11
python3.12-dev 3.12.3-1ubuntu0.11
python3.12-doc 3.12.3-1ubuntu0.11
python3.12-examples 3.12.3-1ubuntu0.11
python3.12-full 3.12.3-1ubuntu0.11
python3.12-minimal 3.12.3-1ubuntu0.11
python3.12-nopie 3.12.3-1ubuntu0.11
python3.12-venv 3.12.3-1ubuntu0.11
Ubuntu 22.04 LTS
idle-python3.10 3.10.12-1~22.04.14
idle-python3.11 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
libpython3.10 3.10.12-1~22.04.14
libpython3.10-dev 3.10.12-1~22.04.14
libpython3.10-minimal 3.10.12-1~22.04.14
libpython3.10-stdlib 3.10.12-1~22.04.14
libpython3.10-testsuite 3.10.12-1~22.04.14
libpython3.11 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
libpython3.11-dev 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
libpython3.11-minimal 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
libpython3.11-stdlib 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
libpython3.11-testsuite 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
python3.10 3.10.12-1~22.04.14
python3.10-dev 3.10.12-1~22.04.14
python3.10-doc 3.10.12-1~22.04.14
python3.10-examples 3.10.12-1~22.04.14
python3.10-full 3.10.12-1~22.04.14
python3.10-minimal 3.10.12-1~22.04.14
python3.10-nopie 3.10.12-1~22.04.14
python3.10-venv 3.10.12-1~22.04.14
python3.11 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
python3.11-dev 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
python3.11-doc 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
python3.11-examples 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
python3.11-full 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
python3.11-minimal 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
python3.11-nopie 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
python3.11-venv 3.11.0~rc1-1~22.04.1~esm8
Available with Ubuntu Pro
Ubuntu 20.04 LTS
idle-python3.8 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
idle-python3.9 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
libpython3.8 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
libpython3.8-dev 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
libpython3.8-minimal 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
libpython3.8-stdlib 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
libpython3.8-testsuite 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
libpython3.9 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
libpython3.9-dev 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
libpython3.9-minimal 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
libpython3.9-stdlib 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
libpython3.9-testsuite 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
python3.8 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
python3.8-dev 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
python3.8-doc 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
python3.8-examples 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
python3.8-full 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
python3.8-minimal 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
python3.8-venv 3.8.10-0ubuntu1~20.04.18+esm5
Available with Ubuntu Pro
python3.9 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
python3.9-dev 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
python3.9-doc 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
python3.9-examples 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
python3.9-full 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
python3.9-minimal 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
python3.9-venv 3.9.5-3ubuntu0~20.04.1+esm9
Available with Ubuntu Pro
Ubuntu 18.04 LTS
idle-python3.6 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
idle-python3.7 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
idle-python3.8 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.6 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
libpython3.6-dev 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
libpython3.6-minimal 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
libpython3.6-stdlib 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
libpython3.6-testsuite 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
libpython3.7 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.7-dev 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.7-minimal 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.7-stdlib 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.7-testsuite 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.8 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.8-dev 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.8-minimal 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.8-stdlib 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
libpython3.8-testsuite 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.6 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
python3.6-dev 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
python3.6-doc 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
python3.6-examples 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
python3.6-minimal 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
python3.6-venv 3.6.9-1~18.04ubuntu1.13+esm8
Available with Ubuntu Pro
python3.7 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.7-dev 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.7-doc 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.7-examples 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.7-minimal 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.7-venv 3.7.5-2ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.8 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.8-dev 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.8-examples 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.8-minimal 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
python3.8-venv 3.8.0-3ubuntu1~18.04.2+esm9
Available with Ubuntu Pro
Ubuntu 16.04 LTS
idle-python3.5 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
libpython3.5 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
libpython3.5-dev 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
libpython3.5-minimal 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
libpython3.5-stdlib 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
libpython3.5-testsuite 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
python3.5 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
python3.5-dev 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
python3.5-doc 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
python3.5-examples 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
python3.5-minimal 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
python3.5-venv 3.5.2-2ubuntu0~16.04.13+esm21
Available with Ubuntu Pro
Ubuntu 14.04 LTS
idle-python3.4 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
idle-python3.5 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
libpython3.4 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
libpython3.4-dev 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
libpython3.4-minimal 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
libpython3.4-stdlib 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
libpython3.4-testsuite 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
libpython3.5 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
libpython3.5-dev 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
libpython3.5-minimal 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
libpython3.5-stdlib 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
libpython3.5-testsuite 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
python3.4 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
python3.4-dev 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
python3.4-doc 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
python3.4-examples 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
python3.4-minimal 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
python3.4-venv 3.4.3-1ubuntu1~14.04.7+esm19
Available with Ubuntu Pro
python3.5 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
python3.5-dev 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
python3.5-doc 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
python3.5-examples 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
python3.5-minimal 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
python3.5-venv 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8018-1
CVE-2025-11468, CVE-2025-12084, CVE-2025-13837, CVE-2025-15282,
CVE-2025-15366, CVE-2025-15367, CVE-2026-0672, CVE-2026-0865
Package Information:
https://launchpad.net/ubuntu/+source/python3.13/3.13.7-1ubuntu0.3
https://launchpad.net/ubuntu/+source/python3.14/3.14.0-1ubuntu0.2
https://launchpad.net/ubuntu/+source/python3.12/3.12.3-1ubuntu0.11
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