How severe is CVE-2026-58659?

CVE-2026-58659 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-58659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-58659?

CVE-2026-58659 affects Lightningai Pytorch Lightning. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-58659?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-58659 published?

CVE-2026-58659 was published on 2026-07-15 and last updated on 2026-08-06.

CVE-2026-58659

CVE-2026-58659 is a high-severity vulnerability in Lightningai Pytorch Lightning with a CVSS 3.x base score of 7.8. 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-470.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.4
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-470
Affected product: Lightningai Pytorch Lightning
Published: 2026-07-15
Last modified: 2026-08-06

Description

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.

Frequently asked questions

What is CVE-2026-58659?: 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.
How severe is CVE-2026-58659?: CVE-2026-58659 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-58659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-58659?: CVE-2026-58659 affects Lightningai Pytorch Lightning. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-58659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-58659 published?: CVE-2026-58659 was published on 2026-07-15 and last updated on 2026-08-06.

References

Affected products (1)

cpe:2.3:a:lightningai:pytorch_lightning:*:*:*:*:*:python:*:*

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