CVE-2026-58659 | PyTorch Lightning through 2.6.5, fixed in commit d710d68, co… | CVSS 7.8 HIGH

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.

Metadata

CVE ID: CVE-2026-58659
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-01 21:54 UTC
Published: 2026-07-15 17:02 UTC
Last updated: 2026-07-15 17:02 UTC
Primary CWE: CWE-470
Use of Externally-Controlled Input to Select Classes or Code…
Vendor / Product: Lightning-AI / pytorch-lightning
Sources: cve.org · NVD

Severity & Metrics

7.8 HIGH CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products (1)

Vendor	Product	Platform	Versions
Lightning-AI	pytorch-lightning	—	0 ≤ 2.6.5, d710d689510d50e800f53b3cd773cbca20b1f86f

Weakness (CWE)

CWE	Source	Description
CWE-470	cna	Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.4	HIGH	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8	HIGH	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References (4)