How severe is CVE-2026-4360?

CVE-2026-4360 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-4360 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4360?

CVE-2026-4360 affects Python. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4360?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-4360 published?

CVE-2026-4360 was published on 2026-06-30 and last updated on 2026-08-13.

CVE-2026-4360

CVE-2026-4360 is a medium-severity vulnerability in Python with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-281.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 2.0
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-281
Affected product: Python
Published: 2026-06-30
Last modified: 2026-08-13

Description

In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.

Frequently asked questions

What is CVE-2026-4360?: In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.
How severe is CVE-2026-4360?: CVE-2026-4360 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-4360 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4360?: CVE-2026-4360 affects Python. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4360?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-4360 published?: CVE-2026-4360 was published on 2026-06-30 and last updated on 2026-08-13.

References

Affected products (1)

cpe:2.3:a:python:python:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

187.62.205.20 (ipv4-addr)
165.227.217.111 (ipv4-addr)
103.44.14.22 (ipv4-addr)
182.191.69.70 (ipv4-addr)
8.211.195.173 (ipv4-addr)