CVE-2026-11972: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-wqxf-pjxh-hh4h
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CWE-252
Published
Advisory Summary

CVE-2026-11972 is a HIGH security vulnerability vulnerability (CWE-252: Unchecked Return Value) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-11972 at a Glance

CVE Identifier CVE-2026-11972
GHSA Identifier GHSA-wqxf-pjxh-hh4h
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-252: Unchecked Return Value
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-11972

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-11972, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-252: Unchecked Return Value, where the product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

When using the "tarfile" module with a file opened in "streaming mode" (mode="r|") the tarfile module did not properly handle EOF, meaning an archive could be parsed in an infinite loop.

References

NVD — CVE-2026-11972 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11972
Software Source Repository REPOSITORY
https://github.com/python/cpython/issues/151981
Software Source Repository REPOSITORY
https://github.com/python/cpython/pull/151982
Security Fix Commit FIX COMMIT
https://github.com/python/cpython/commit/3f031d431f80668e14f3bc066bbf4369cd9281b9
Security Fix Commit FIX COMMIT
https://github.com/python/cpython/commit/4ce6bf7c8aa7725828a38981c306f214c1f29365
Security Fix Commit FIX COMMIT
https://github.com/python/cpython/commit/7f0dc59c9a70f8f3b4da33d7c4a2ba552a7acc21
Security Fix Commit FIX COMMIT
https://github.com/python/cpython/commit/e86666c9dd256d52d0fbef6feb1ea4a51768fdec
Security Fix Commit FIX COMMIT
https://github.com/python/cpython/commit/eb63c0f94dfcbea7fda8eab6213818e134d67192
Security Fix Commit FIX COMMIT
https://github.com/python/cpython/commit/f50bf13566189c8d0ce5a814f33eff3d89951896
Security Fix Commit FIX COMMIT
https://github.com/python/cpython/commit/f5e2776ff0383a902c12acf2b703e7e951fc8438
Software Security Information SECURITY
https://mail.python.org/archives/list/security-announce@python.org/thread/AXPSKKTSRKXTTJULW3XSIC74WZNAAPPB

Frequently Asked Questions

What is CVE-2026-11972?
CVE-2026-11972 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-252: Unchecked Return Value.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-11972?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-11972?
CVE-2026-11972 is classified under CWE-252: Unchecked Return Value (The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.).
How can I check Maven dependencies for CVE-2026-11972?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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}