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CVE-2025-8194

7.5 · HIGH

There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs.

Published Jul 28, 2025CWE-835EPSS 0.67%

Overview

CVE-2025-8194 is a high-severity vulnerability. It was published on July 28, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives.

This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:  https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1GitHubgithub.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2GitHubgithub.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38GitHubgithub.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19GitHubgithub.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cbGitHubgithub.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29fGitHubgithub.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193feGitHubgithub.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227GitHubgithub.com/python/cpython/issues/130577GitHubgithub.com/python/cpython/pull/137027

How CyberStrike helps

Frequently asked questions

What is CVE-2025-8194?

CVE-2025-8194 is a high-severity vulnerability. It was published on July 28, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-8194?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-8194?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-8194?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-8194 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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