CVE-2026-82049 tarfile extraction filters allow file modification and content disclosure via hard link to symlink
Attackers can craft tar archives to modify permissions or disclose contents of files outside the extraction directory via hard link to symlink tricks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-82049?
CVE-2026-82049 is a high-severity path traversal vulnerability in CPython, published on 14 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.
Weakness: CWE-59
Which versions are affected by CVE-2026-82049?
3 open source packages ship an affected version, including libpython, python and python-min.
| Package | Affected | Fixed in |
|---|---|---|
libpython Bitnami | All versions | 3.10.22, 3.11.17, 3.12.15, 3.13.16 |
python Bitnami | All versions | 3.10.22, 3.11.17, 3.12.15, 3.13.16 |
python-min Bitnami | All versions | 3.10.22, 3.11.17, 3.12.15, 3.13.16 |
Linux distribution packages (8)
python SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 2.7.18-150000.136.1 |
python-base SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 2.7.18-150000.136.1 |
python SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 2.7.18-33.93.1 |
python-base SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 2.7.18-33.93.1 |
python-doc SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 2.7.18-33.93.1 |
python SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 2.7.18-33.93.1 |
python-base SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 2.7.18-33.93.1 |
python-doc SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 2.7.18-33.93.1 |
How do I fix CVE-2026-82049?
Upgrade libpython to a fixed version for your release line: 3.10.22, 3.11.17, 3.12.15 or 3.13.16.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-82049 being exploited?
There is no known exploitation of CVE-2026-82049 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2026-82049, AZL-101784, AZL-101832, BELL-CVE-2026-82049, BIT-libpython-2026-82049, BIT-python-2026-82049 and 21 more.