Python CPython up to 3.14.0b1 calculation

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Python CPython up to 3.14.0b1 and classified as problematic. This affects an unknown part. Executing a manipulation can lead to an unknown weakness. This vulnerability is tracked as CVE-2025-4435. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Python CPython up to 3.14.0b1 and classified as problematic. The CWE definition for the vulnerability is CWE-682. The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management. As an impact it is known to affect integrity. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-4435 since 05/08/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 240322 (Amazon Linux 2023 : python3.12, python3.12-devel, python3.12-idle (ALAS2023-2025-1044)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.14.0b2 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (240322), EUVD (EUVD-2025-16725) and CERT Bund (WID-SEC-2025-1231). Once again VulDB remains the best source for vulnerability data.

Affected

  • IBM AIX
  • IBM VIOS
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Gentoo Linux
  • Red Hat OpenShift
  • SUSE openSUSE
  • RESF Rocky Linux
  • NetApp ActiveIQ Unified Manager
  • Dell Avamar
  • IBM TXSeries
  • Open Source Python
  • IBM QRadar SIEM
  • Dell NetWorker
  • Dell Secure Connect Gateway

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (PSF): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Calculation
CWE: CWE-682
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 240322
Nessus Name: Amazon Linux 2023 : python3.12, python3.12-devel, python3.12-idle (ALAS2023-2025-1044)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: CPython 3.14.0b2
Patch: github.com

Timelineinfo

05/08/2025 🔍
06/03/2025 +26 days 🔍
06/03/2025 +0 days 🔍
12/21/2025 +201 days 🔍

Sourcesinfo

Product: github.com

Advisory: 135034
Status: Confirmed

CVE: CVE-2025-4435 (🔍)
GCVE (CVE): GCVE-0-2025-4435
GCVE (VulDB): GCVE-100-310972
EUVD: 🔍
CERT Bund: WID-SEC-2025-1231 - Python: Mehrere Schwachstellen

Entryinfo

Created: 06/03/2025 15:51
Updated: 12/21/2025 18:58
Changes: 06/03/2025 15:51 (64), 06/03/2025 16:24 (1), 06/04/2025 07:17 (1), 06/24/2025 12:06 (2), 08/06/2025 21:33 (7), 08/09/2025 22:19 (1), 12/21/2025 18:58 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

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