How severe is CVE-2026-4538?

CVE-2026-4538 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-4538 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4538?

CVE-2026-4538 affects Linuxfoundation Pytorch. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4538?

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

Does CVE-2026-4538 have an EU (EUVD) identifier?

Yes. CVE-2026-4538 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14280.

When was CVE-2026-4538 published?

CVE-2026-4538 was published on 2026-03-22 and last updated on 2026-06-17.

CVE-2026-4538

CVE-2026-4538 is a medium-severity vulnerability in Linuxfoundation Pytorch 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
CVSS v4: 1.9
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-14280
Weakness: CWE-20
Affected product: Linuxfoundation Pytorch
Published: 2026-03-22
Last modified: 2026-06-17

Description

A vulnerability was identified in PyTorch 2.10.0. The affected element is an unknown function of the component pt2 Loading Handler. The manipulation leads to deserialization. The attack can only be performed from a local environment. The exploit is publicly available and might be used. The project was informed of the problem early through a pull request but has not reacted yet.

Frequently asked questions

What is CVE-2026-4538?: A vulnerability was identified in PyTorch 2.10.0. The affected element is an unknown function of the component pt2 Loading Handler. The manipulation leads to deserialization. The attack can only be performed from a local environment. The exploit is publicly available and might be used. The project was informed of the problem early through a pull request but has not reacted yet.
How severe is CVE-2026-4538?: CVE-2026-4538 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-4538 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4538?: CVE-2026-4538 affects Linuxfoundation Pytorch. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4538?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4538 have an EU (EUVD) identifier?: Yes. CVE-2026-4538 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14280.
When was CVE-2026-4538 published?: CVE-2026-4538 was published on 2026-03-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:linuxfoundation:pytorch:2.10.0:*:*:*:*:python:*:*

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