CVE-2026-4538: A vulnerability was identified in PyTorch 2.10.0

Q: How do I fix CVE-2026-4538?

pytorch: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2026-4538 being exploited?

CVE-2026-4538 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-4538 affect?

CVE-2026-4538 affects pytorch. Severity is medium (CVSS 5.3). 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 ex

Q: How urgent is CVE-2026-4538?

Priority 27/100. On your watchlist

Routine

MEDIUM 5.3WATCHLISTDOWNGRADE

CVE-2026-4538 is a medium-severity flaw (CVSS 5.3) affecting pytorch. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-20, CWE-502
Published	2026-03-22
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: linuxfoundation

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-22 05:16 UTCPublished CVE record published
2026-06-17 10:56 UTCUpdated Record last modified

linuxfoundation pytorch DOWNGRADE

Affected: 2.10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.10.0

1. Check installed version

pip show pytorch

2. No fixed release: DOWNGRADE to a release before 2.10.0

pip index versions pytorch pip install "pytorch<2.10.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-4538?

pytorch: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-4538 being exploited?

CVE-2026-4538 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-4538 affect?

CVE-2026-4538 affects pytorch. Severity is medium (CVSS 5.3). 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 ex

How urgent is CVE-2026-4538?

Priority 27/100. On your watchlist

Software pages

PyTorch vulnerabilities

Related CVEs

CVE-2026-24747 HIGH 8.8 UPGRADE PyTorch is a Python package that provides tensor computation

References

← Back to latest CVEs