CVE-2025-11468 Folding email comments of unfoldable characters doesn't preserve parenthesis
Attackers can inject headers into emails by exploiting improper folding of comments with unfoldable characters in Python's email library.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-11468?
CVE-2025-11468 is a medium-severity vulnerability in CPython, published on 20 Jan 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.
Weakness: CWE-93
Which versions are affected by CVE-2025-11468?
3 open source packages ship an affected version, including libpython, python and python-min.
| Package | Affected | Fixed in |
|---|---|---|
libpython Bitnami | All versions | 3.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3 |
python Bitnami | All versions | 3.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3 |
python-min Bitnami | All versions | 3.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3 |
Linux distribution packages (1)
python314 openSUSE:Tumbleweed | All versions | 3.14.2-2.1 |
How do I fix CVE-2025-11468?
Upgrade libpython to a fixed version for your release line: 3.10.20, 3.11.15, 3.12.13 or 3.13.12.
Is CVE-2025-11468 being exploited?
There is no known exploitation of CVE-2025-11468 in the wild and no public exploit code.
Sources
Also known as AZL-75035, AZL-75047, BELL-CVE-2025-11468, BIT-libpython-2025-11468, BIT-python-2025-11468, BIT-python-min-2025-11468 and 11 more.