CVE-2026-58659: PyTorch Lightning through 2.6.5, fixed in commit d710d68, contains a remote code execution vulnerability in th

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HIGH 7.8UPGRADE

CVE-2026-58659 is a high-severity flaw (CVSS 7.8) affecting pytorch lightning. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PyTorch Lightning through 2.6.5, fixed in commit d710d68, contains a remote code execution vulnerability in the _load_state function that imports and executes attacker-controlled module names from checkpoint _instantiator hyperparameters. Attackers can craft malicious checkpoint files that bypass weights_only=True protections to execute arbitrary code when LightningModule.load_from_checkpoint is called.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-470
Published	2026-07-15
Last modified	2026-10-24

Publisher (CNA): VulnCheck · Vendor: lightningai

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-15 18:16 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

lightningai pytorch lightning UPGRADE

Affected: <= 2.6.5

Fixed in: newer than 2.6.5

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show pytorch-lightning

2. UPGRADE to newer than 2.6.5

pip install --upgrade "pytorch-lightning>2.6.5"

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-2026-58659?

pytorch lightning: upgrade to newer than 2.6.5. Exact commands for each OS are on this page.

Is CVE-2026-58659 being exploited?

CVE-2026-58659 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-2026-58659 affect?

CVE-2026-58659 affects pytorch lightning. Severity is high (CVSS 7.8). PyTorch Lightning through 2.6.5, fixed in commit d710d68, contains a remote code execution vulnerability in the _load_state function that imports and executes attacker-controlled module names from checkpoint _instantiator hyperparameters. A

How urgent is CVE-2026-58659?

Priority 45/100. High severity; Public exploit reference

Software pages

PyTorch vulnerabilities · Check Point vulnerabilities

References

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