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Fencer Vulns
high 7.5

CVE-2025-4435 json

Tarfile extracts filtered members when errorlevel=0

published 2025-06-03 17 mo ago modified 2026-07-31 3 mo ago also BIT-libpython-2025-4435 , BIT-python-2025-4435 , BIT-python-min-2025-4435 , EUVD-2025-16725

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

When using a TarFile.errorlevel = 0 and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0 in affected versions is that the member would still be extracted and not skipped.

Patch / fix

  • bitnami libpython 3.9.23, 3.10.18, 3.11.13, 3.12.11, 3.13.4
  • bitnami python 3.9.23, 3.10.18, 3.11.13, 3.12.11, 3.13.4
  • bitnami python-min 3.9.23, 3.10.18, 3.11.13, 3.12.11, 3.13.4
  • Python Software Foundation CPython 3.9.23, 3.10.18, 3.11.13, 3.12.11, 3.13.4, 3.14.0b3
  • pypy3 Debian 14 7.3.20+dfsg-2
  • python3.13 Debian 13 3.13.4-1

debian advisories DEBIAN-CVE-2025-4435

  • python3.12 Ubuntu 24.04 LTS 3.12.3-1ubuntu0.7
  • python3.14 Ubuntu 25.10 3.14.0-1

ubuntu advisories UBUNTU-CVE-2025-4435

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • numpy RHEL 8 1.19.4-3.module+el8.9.0+19644+d68f775d
  • scipy RHEL 8 1.5.4-5.module+el8.9.0+19644+d68f775d
  • Cython RHEL 8 0.29.21-5.module+el8.9.0+19644+d68f775d
  • pytest RHEL 8 6.0.2-2.module+el8.9.0+19644+d68f775d
  • PyYAML RHEL 8 5.4.1-1.module+el8.9.0+19644+d68f775d
  • mod_wsgi RHEL 8 4.7.1-7.module+el8.10.0+23075+0aa18782.1
  • pybind11 RHEL 8 2.7.1-1.module+el8.9.0+19644+d68f775d
  • python39 RHEL 8 3.9.25-2.module+el8.10.0+23718+1842ae33

red hat advisories RHSA-2025:23530RHSA-2025:10602RHSA-2025:10484RHSA-2025:10399RHSA-2025:10189RHSA-2025:10148

  • python312 SLE Module for Python 3 15 SP6, openSUSE Leap 15.6 3.12.11-150600.3.33.1
  • python312-core SLE Module for Python 3 15 SP6, openSUSE Leap 15.6 3.12.11-150600.3.33.1
  • python312-documentation openSUSE Leap 15.6 3.12.11-150600.3.33.1
  • python3 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +18 more 3.6.15-150300.10.97.2
  • python3-core SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +20 more 3.6.15-150300.10.97.1
  • python3-documentation openSUSE Leap 15.6 3.6.15-150300.10.97.1
  • python313 SLE Module for Python 3 15 SP7 3.13.5-150700.4.20.1
  • python313-core SLE Module for Python 3 15 SP7 3.13.5-150700.4.20.1

suse advisories SUSE-SU-2026:4744-1SUSE-SU-2026:0210-1SUSE-SU-2025:02359-1SUSE-SU-2025:02778-1SUSE-SU-2025:02767-1SUSE-SU-2025:02717-1

  • python315 openSUSE Tumbleweed 3.15.0~a1-1.1
  • python314 openSUSE Tumbleweed 3.14.0~b3-3.1

opensuse advisories openSUSE-SU-2025:15713-1openSUSE-SU-2025:15289-1

  • python39 AlmaLinux 8 3.9.25-2.module_el8.10.0+4083+53cad1fb
  • python39-py AlmaLinux 8 1.10.0-1.module_el8.6.0+2780+a40f65e1
  • python39-pip AlmaLinux 8 20.2.4-9.module_el8.10.0+3765+2f9a457d
  • python39-ply AlmaLinux 8 3.11-10.module_el8.6.0+2780+a40f65e1
  • python39-six AlmaLinux 8 1.15.0-3.module_el8.6.0+2780+a40f65e1
  • python39-cffi AlmaLinux 8 1.14.3-2.module_el8.6.0+2780+a40f65e1
  • python39-cffi AlmaLinux 8 1.14.3-2.module_el8.6.0+3248+c431e88c
  • python39-idle AlmaLinux 8 3.9.25-2.module_el8.10.0+4083+53cad1fb

almalinux advisories ALSA-2025:23530ALSA-2025:10189ALSA-2025:10026ALSA-2025:10031ALSA-2025:10128ALSA-2025:10136

  • python3 Rocky Linux 8 3.6.8-70.el8_10.rocky.0
  • numpy Rocky Linux 8 1.19.4-3.module+el8.10.0+1582+bc278001
  • numpy Rocky Linux 8 1.19.4-3.module+el8.10.0+1860+afcc1c71
  • scipy Rocky Linux 8 1.5.4-5.module+el8.10.0+1860+afcc1c71
  • scipy Rocky Linux 8 1.5.4-5.module+el8.10.0+1582+bc278001
  • Cython Rocky Linux 8 0.29.21-5.module+el8.10.0+1582+bc278001
  • Cython Rocky Linux 8 0.29.21-5.module+el8.10.0+1860+afcc1c71
  • pytest Rocky Linux 8 6.0.2-2.module+el8.10.0+1860+afcc1c71

rocky linux advisories RLSA-2025:10128RLSA-2025:23530RLSA-2025:10136RLSA-2025:10148RLSA-2025:10189RLSA-2025:10140

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-2025-4435 updated cvss 7.5

cpython: Tarfile extracts filtered members when errorlevel=0

  • Red Hat CodeReady Linux Builder EUS (v.9.4) python3 3.9.18-3.el9_4.8, python3.11 3.11.7-1.el9_4.8, python3.12 3.12.1-4.el9_4.6, python3-idle 3.9.18-3.el9_4.8, python3-test 3.9.18-3.el9_4.8, python3-tkinter 3.9.18-3.el9_4.8, +6 more
    fixed: vendor fix RHSA-2025:10399
  • Red Hat Discovery 2 discovery 2.0.1-1754478727
    fixed: vendor fix RHSA-2025:13267
  • Red Hat Enterprise Linux AppStream (v. 8) python3.11 3.11.13-1.el8_10, python3.12 3.12.11-1.el8_10, python3-idle 3.6.8-70.el8_10, python3-test 3.6.8-70.el8_10, platform-python 3.6.8-70.el8_10, python3-tkinter 3.6.8-70.el8_10, +61 more
    fixed: vendor fix RHSA-2025:23530
  • Red Hat Enterprise Linux AppStream (v. 9) python3.12 3.12.9-1.el9_6.1, python3.11 3.11.11-2.el9_6.1, python3-tkinter 3.9.21-2.el9_6.1, python3.12-libs 3.12.9-1.el9_6.1, python3.11-libs 3.11.11-2.el9_6.1, python3.12-tkinter 3.12.9-1.el9_6.1, +2 more
    fixed: vendor fix RHSA-2025:10136
  • Red Hat Enterprise Linux AppStream (v. 10) python3-tkinter 3.12.9-2.el10_0.2, python-unversioned-command 3.12.9-2.el10_0.2
    fixed: vendor fix RHSA-2025:10140
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) python3-idle 3.6.8-47.el8_6.8, python3-test 3.6.8-47.el8_6.8, platform-python 3.6.8-47.el8_6.8, python3-tkinter 3.6.8-47.el8_6.8 Red Hat Enterprise Linux AppStream E4S (v.8.6) python3-idle 3.6.8-47.el8_6.8, python3-test 3.6.8-47.el8_6.8, platform-python 3.6.8-47.el8_6.8, python3-tkinter 3.6.8-47.el8_6.8
    fixed: vendor fix RHSA-2025:10484
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) python3-idle 3.6.8-51.el8_8.10, python3-test 3.6.8-51.el8_8.10, platform-python 3.6.8-51.el8_8.10, python3-tkinter 3.6.8-51.el8_8.10
    fixed: vendor fix RHSA-2025:10602
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) python3.11 3.11.7-1.el9_4.8, python3.12 3.12.1-4.el9_4.6, python3-tkinter 3.9.18-3.el9_4.8, python3.11-libs 3.11.7-1.el9_4.8, python3.12-libs 3.12.1-4.el9_4.6, python3.11-tkinter 3.11.7-1.el9_4.8, +2 more
    fixed: vendor fix RHSA-2025:10399
show 18 more
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) python3-idle 3.6.8-47.el8_6.8, python3-test 3.6.8-47.el8_6.8, platform-python 3.6.8-47.el8_6.8, python3-tkinter 3.6.8-47.el8_6.8
    fixed: vendor fix RHSA-2025:10484
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.8) python3-idle 3.6.8-51.el8_8.10, python3-test 3.6.8-51.el8_8.10, platform-python 3.6.8-51.el8_8.10, python3-tkinter 3.6.8-51.el8_8.10
    fixed: vendor fix RHSA-2025:10602
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) python3-idle 3.6.8-47.el8_6.8, python3-test 3.6.8-47.el8_6.8, platform-python 3.6.8-47.el8_6.8, python3-tkinter 3.6.8-47.el8_6.8
    fixed: vendor fix RHSA-2025:10484
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) python3-idle 3.6.8-51.el8_8.10, python3-test 3.6.8-51.el8_8.10, platform-python 3.6.8-51.el8_8.10, python3-tkinter 3.6.8-51.el8_8.10
    fixed: vendor fix RHSA-2025:10602
  • Red Hat Enterprise Linux BaseOS (v. 8) python3 3.6.8-70.el8_10, python3-libs 3.6.8-70.el8_10, python3-test 3.6.8-70.el8_10, platform-python 3.6.8-70.el8_10
    fixed: vendor fix RHSA-2025:10128
  • Red Hat Enterprise Linux BaseOS (v. 9) python3 3.9.21-2.el9_6.1, python3.9 3.9.21-2.el9_6.1, python3-libs 3.9.21-2.el9_6.1
    fixed: vendor fix RHSA-2025:10136
  • Red Hat Enterprise Linux BaseOS (v. 10) python3 3.12.9-2.el10_0.2, python3.12 3.12.9-2.el10_0.2, python3-libs 3.12.9-2.el10_0.2
    fixed: vendor fix RHSA-2025:10140
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) python3 3.6.8-47.el8_6.8, python3-libs 3.6.8-47.el8_6.8, python3-test 3.6.8-47.el8_6.8, platform-python 3.6.8-47.el8_6.8 Red Hat Enterprise Linux BaseOS E4S (v.8.6) python3 3.6.8-47.el8_6.8, python3-libs 3.6.8-47.el8_6.8, python3-test 3.6.8-47.el8_6.8, platform-python 3.6.8-47.el8_6.8
    fixed: vendor fix RHSA-2025:10484
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) python3 3.6.8-51.el8_8.10, python3-libs 3.6.8-51.el8_8.10, python3-test 3.6.8-51.el8_8.10, platform-python 3.6.8-51.el8_8.10
    fixed: vendor fix RHSA-2025:10602
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) python3 3.9.18-3.el9_4.8, python3.9 3.9.18-3.el9_4.8, python3-libs 3.9.18-3.el9_4.8
    fixed: vendor fix RHSA-2025:10399
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) python3 3.6.8-47.el8_6.8, python3-libs 3.6.8-47.el8_6.8, python3-test 3.6.8-47.el8_6.8, platform-python 3.6.8-47.el8_6.8
    fixed: vendor fix RHSA-2025:10484
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.8) python3 3.6.8-51.el8_8.10, python3-libs 3.6.8-51.el8_8.10, python3-test 3.6.8-51.el8_8.10, platform-python 3.6.8-51.el8_8.10
    fixed: vendor fix RHSA-2025:10602
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) python3 3.6.8-47.el8_6.8, python3-libs 3.6.8-47.el8_6.8, python3-test 3.6.8-47.el8_6.8, platform-python 3.6.8-47.el8_6.8
    fixed: vendor fix RHSA-2025:10484
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) python3 3.6.8-51.el8_8.10, python3-libs 3.6.8-51.el8_8.10, python3-test 3.6.8-51.el8_8.10, platform-python 3.6.8-51.el8_8.10
    fixed: vendor fix RHSA-2025:10602
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) python3 3.9.21-2.el9_6.1, python3.12 3.12.9-1.el9_6.1, python3.11 3.11.11-2.el9_6.1, python3-idle 3.9.21-2.el9_6.1, python3-test 3.9.21-2.el9_6.1, python3-tkinter 3.9.21-2.el9_6.1, +6 more
    fixed: vendor fix RHSA-2025:10136
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) python3-idle 3.12.9-2.el10_0.2, python3-test 3.12.9-2.el10_0.2
    fixed: vendor fix RHSA-2025:10140
  • Red Hat Enterprise Linux CRB (v. 8) python3.11 3.11.13-1.el8_10, python3.12 3.12.11-1.el8_10, python3.11-idle 3.11.13-1.el8_10, python3.11-test 3.11.13-1.el8_10, python3.12-idle 3.12.11-1.el8_10, python3.12-test 3.12.11-1.el8_10, +24 more
    fixed: vendor fix RHSA-2025:23530
  • Red Hat Discovery 2 discovery 2.0.1-1754485705 Red Hat Enterprise Linux 8 scipy, python36, python-nose, python-wheel, python3-bson, python3-nose, +19 more Red Hat Enterprise Linux AI (RHEL AI) rhelai1/bootc-amd-rhel9, rhelai1/bootc-intel-rhel9, rhelai1/bootc-nvidia-rhel9, rhelai1/bootc-azure-amd-rhel9, rhelai1/instructlab-amd-rhel9, rhelai1/bootc-aws-nvidia-rhel9, +7 more
    not affected: vulnerable code not present

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 ICSA-26-043-06 updated cvss 7.5

Siemens SINEC OS

  • Siemens RUGGEDCOM RST2428P (6GK6242-6PA00) < 3.3
    affected: fixed in V3.3 support.industry.siemens.com
  • Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family < 3.3
    affected: fixed in V3.3
  • Siemens SCALANCE XCH328 (6GK5328-4TS01-2EC2) < 3.3 Siemens SCALANCE XCM324 (6GK5324-8TS01-2AC2) < 3.3 Siemens SCALANCE XCM328 (6GK5328-4TS01-2AC2) < 3.3 Siemens SCALANCE XCM332 (6GK5332-0GA01-2AC2) < 3.3 Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3) < 3.3 Siemens SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3) < 3.3
    +8 more products
    Siemens SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3) < 3.3 Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-4AR3) < 3.3 Siemens SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3) < 3.3 Siemens SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3) < 3.3 Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-2AR3) < 3.3 Siemens SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3) < 3.3 Siemens SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3) < 3.3 Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-3AR3) < 3.3
    affected: fixed in V3.3 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
17 mo ago

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
bitnami libpython
<3.9.23
>=3.10.0, <3.10.18
>=3.11.0, <3.11.13
>=3.12.0, <3.12.11
>=3.13.0, <3.13.4
3.9.23
3.10.18
3.11.13
3.12.11
3.13.4
bitnami python
<3.9.23
>=3.10.0, <3.10.18
>=3.11.0, <3.11.13
>=3.12.0, <3.12.11
>=3.13.0, <3.13.4
3.9.23
3.10.18
3.11.13
3.12.11
3.13.4
bitnami python-min
<3.9.23
>=3.10.0, <3.10.18
>=3.11.0, <3.11.13
>=3.12.0, <3.12.11
>=3.13.0, <3.13.4
3.9.23
3.10.18
3.11.13
3.12.11
3.13.4

Affected products

  • Python Software Foundation CPython

Classification

Weakness

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.