CVE-2026-114583 tar filter allows writing outside destination via empty-named symlink
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114583?
CVE-2026-114583 is a medium-severity vulnerability in CPython, published on 22 Oct 2026.
Official description
tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter="tar" to write files outside the destination directory, subject to the permissions of the extracting process.
This is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.
Which versions are affected by CVE-2026-114583?
3 open source packages ship an affected version, including libpython, python and python-min.
| Package | Affected | Fixed in |
|---|---|---|
libpython Bitnami | All versions | 3.11.18, 3.12.16, 3.13.18, 3.14.10, 3.15.2 |
python Bitnami | All versions | 3.11.18, 3.12.16, 3.13.18, 3.14.10, 3.15.2 |
python-min Bitnami | All versions | 3.11.18, 3.12.16, 3.13.18, 3.14.10, 3.15.2 |
How do I fix CVE-2026-114583?
Upgrade libpython to a fixed version for your release line: 3.11.18, 3.12.16, 3.13.18 or 3.14.10.
Is CVE-2026-114583 being exploited?
There is no known exploitation of CVE-2026-114583 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2026-114583, AZL-110549, AZL-110552, AZL-111095, BELL-CVE-2026-114583, BIT-libpython-2026-114583 and 7 more.