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Fencer Vulns
medium 6.9

CVE-2026-114583 json

tar filter allows writing outside destination via empty-named symlink

published 2026-10-22 17 d ago modified 2026-11-02 6 d ago also BIT-libpython-2026-114583 , BIT-python-2026-114583 , BIT-python-min-2026-114583 , EUVD-2026-108512

cvss
6.9
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami libpython 3.11.18, 3.12.16, 3.13.18, 3.14.10, 3.15.2
  • bitnami python 3.11.18, 3.12.16, 3.13.18, 3.14.10, 3.15.2
  • bitnami python-min 3.11.18, 3.12.16, 3.13.18, 3.14.10, 3.15.2
  • Python Software Foundation CPython 3.11.18, 3.12.16, 3.13.18, 3.14.10, 3.15.2, 3.16.0
  • python3.14 Debian 14 3.14.9-1
  • python3.15 Debian 14 3.15.1-1

debian advisories DEBIAN-CVE-2026-114583

  • python315 openSUSE Tumbleweed 3.15.2-1.1

opensuse advisories openSUSE-SU-2026:12348-1

  • python3 Alpine 3.23, Alpine 3.22, Alpine 3.21 3.12.16-r0
  • python3 Alpine 3.24 3.14.10-r0

alpine advisories ALPINE-CVE-2026-114583

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python3 Azure Linux 3.0 3.12.16-1

azure linux advisories AZL-110552

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-114583 updated cvss 6.2

python: python: Arbitrary file write via tarfile extraction filter bypass

  • Red Hat Enterprise Linux 6 python, tkinter, python-libs, python-test, python-tools
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 python, python3, tkinter, python-libs, python-test, python-tools, +4 more Red Hat Enterprise Linux 8 scipy, python3, python36, python3.12, python-nose, python-wheel, +32 more Red Hat Enterprise Linux 9 python3, python3.9, python3.12, python3.14, python3-idle, python3-libs, +18 more Red Hat Enterprise Linux 10 python3.14 3.14.8-1.el10_2, python3.12 3.12.15-1.el10_2 Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/bootc-aws-cuda-rhel9, rhelai3/bootc-gcp-cuda-rhel9, rhelai3/bootc-azure-cuda-rhel9, +1 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images python3.14 3.14.8-1.el10_2, python3.15 3.15.0-1.1.hum1, python3.10 3.10.22-1.1.hum1, python3.11 3.11.17-1.1.hum1, python3.12 3.12.15-1.el10_2, python3.13 3.13.16-1.1.hum1
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat OpenShift Virtualization 4 container-native-virtualization/ocp-virt-validation-checkup-rhel9 Red Hat Self-service automation portal 2 ansible-automation-platform/bootc-automation-portal-rhel9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 d ago

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CNA 4.0 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
bitnami libpython
<3.11.18
>=3.12.0, <3.12.16
>=3.13.0, <3.13.18
>=3.14.0, <3.14.10
>=3.15.0, <3.15.2
3.11.18
3.12.16
3.13.18
3.14.10
3.15.2
bitnami python
<3.11.18
>=3.12.0, <3.12.16
>=3.13.0, <3.13.18
>=3.14.0, <3.14.10
>=3.15.0, <3.15.2
3.11.18
3.12.16
3.13.18
3.14.10
3.15.2
bitnami python-min
<3.11.18
>=3.12.0, <3.12.16
>=3.13.0, <3.13.18
>=3.14.0, <3.14.10
>=3.15.0, <3.15.2
3.11.18
3.12.16
3.13.18
3.14.10
3.15.2

Affected products

  • Python Software Foundation CPython

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.