CVSS 4.0
5.3 mediumCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NCVE-2026-115791 Prevent shadowing stdlib in gzip/tarfile/zipfile CLI during extraction
Medium (5.3) in python software foundation cpython. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
On this page
When tarfile or zipfile command line interface (CLI) is used to
decompress an archive, a Python script shadowing the stdlib can be
created. Then if an error occurs during decompressing the next file,
the newly created Python script is executed. This is especially true
if the created Python is called traceback.py. The problem is that
Python adds the current directory to sys.path when python -m MODULE is
run, and the archive is also decompressed in the current directory.
The fix removes sys.path[0] in gzip, tarfile and zipfile command line
interface to prevent shadowing standard library modules from extracted
files.
Severity
- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 5th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-829 Inclusion of Functionality from Untrusted Control Sphere
- OWASP Top 10
- A08:2025 Software or Data Integrity Failures
- Published
- Modified
- Assigned by
- PSF (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
- python software foundation:cpython
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Python Software Foundation CPython | before 3.16.0 |
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Ubuntu | 22.04:LTS | python3.10 | no fix listed | UBUNTU-CVE-2026-115791 |
| Ubuntu | 24.04:LTS | python3.12 | no fix listed | UBUNTU-CVE-2026-115791 |
| Ubuntu | 26.04:LTS, 26.10 | python3.14 | no fix listed | UBUNTU-CVE-2026-115791 |
| Ubuntu | Pro:14.04:LTS | python2.7, python3.4, python3.5 | no fix listed | UBUNTU-CVE-2026-115791 |
| Ubuntu | Pro:16.04:LTS | python2.7, python3.5 | no fix listed | UBUNTU-CVE-2026-115791 |
| Ubuntu | Pro:18.04:LTS | python2.7, python3.6, python3.7 and 1 more | no fix listed | UBUNTU-CVE-2026-115791 |
| Ubuntu | Pro:20.04:LTS | python2.7, python3.8, python3.9 | no fix listed | UBUNTU-CVE-2026-115791 |
| Ubuntu | Pro:22.04:LTS | python2.7, python3.11 | no fix listed | UBUNTU-CVE-2026-115791 |
| Azure Linux | 3 | python-py | no fix listed | AZL-113326 |
| Azure Linux | 3 | python3 | no fix listed | AZL-113332 |
| Azure Linux | 3 | tensorflow | no fix listed | AZL-113639 |
From the distributions' data via OSV.dev: Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; Microsoft's Azure Linux vulnerability data, MIT. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Ubuntu.
Attack patterns (CAPEC)
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits. More on the page of CWE-829 (13).