Summary
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)
Fixed packages 13
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 22.04 LTS 22.04:LTS | python3.10 | 3.10.12-1~22.04.14 |
| Ubuntu · 24.04 LTS 24.04:LTS | python3.12 | 3.12.3-1ubuntu0.11 |
| Ubuntu · 25.10 | python3.13 | 3.13.7-1ubuntu0.3 |
| Ubuntu · 25.10 | python3.14 | 3.14.0-1ubuntu0.2 |
| Ubuntu · Pro 14.04 LTS Pro:14.04:LTS | python3.4 | 3.4.3-1ubuntu1~14.04.7+esm19 |
| Ubuntu · Pro 14.04 LTS Pro:14.04:LTS | python3.5 | 3.5.2-2ubuntu0~16.04.4~14.04.1+esm9 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | python3.5 | 3.5.2-2ubuntu0~16.04.13+esm21 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | python3.6 | 3.6.9-1~18.04ubuntu1.13+esm8 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | python3.7 | 3.7.5-2ubuntu1~18.04.2+esm9 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | python3.8 | 3.8.0-3ubuntu1~18.04.2+esm9 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | python3.8 | 3.8.10-0ubuntu1~20.04.18+esm5 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | python3.9 | 3.9.5-3ubuntu0~20.04.1+esm9 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | python3.11 | 3.11.0~rc1-1~22.04.1~esm8 |
References
-
report
https://ubuntu.com/security/CVE-2025-11468
-
report
https://ubuntu.com/security/CVE-2025-12084
-
report
https://ubuntu.com/security/CVE-2025-13837
-
report
https://ubuntu.com/security/CVE-2025-15282
-
report
https://ubuntu.com/security/CVE-2025-15366
-
report
https://ubuntu.com/security/CVE-2025-15367
-
report
https://ubuntu.com/security/CVE-2026-0672
-
report
https://ubuntu.com/security/CVE-2026-0865