PYSEC-2026-385

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/lightning/PYSEC-2026-385.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-385
Aliases
Published
2026-06-29T11:50:42.195093Z
Modified
2026-06-29T12:15:27.842201654Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Remote code execution in pytorch lightning
Details

A remote code execution (RCE) vulnerability exists in the lightning-ai/pytorch-lightning library version 2.2.1 due to improper handling of deserialized user input and mismanagement of dunder attributes by the deepdiff library. The library uses deepdiff.Delta objects to modify application state based on frontend actions. However, it is possible to bypass the intended restrictions on modifying dunder attributes, allowing an attacker to construct a serialized delta that passes the deserializer whitelist and contains dunder attributes. When processed, this can be exploited to access other modules, classes, and instances, leading to arbitrary attribute write and total RCE on any self-hosted pytorch-lightning application in its default configuration, as the delta endpoint is enabled by default.

References

Affected packages

PyPI / lightning

Package

Name
lightning
View open source insights on deps.dev
Purl
pkg:pypi/lightning

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.3.3

Affected versions

1.*
1.8.0rc1
1.8.0rc2
1.8.0
1.8.0.post1
1.8.1
1.8.2
1.8.3
1.8.3.post0
1.8.3.post1
1.8.3.post2
1.8.4
1.8.4.post0
1.8.5
1.8.5.post0
1.8.6
1.9.0rc0
1.9.0
1.9.1
1.9.2
1.9.3
1.9.4
1.9.5
2.*
2.0.0rc0
2.0.0
2.0.1
2.0.1.post0
2.0.2
2.0.3
2.0.4
2.0.5
2.0.6
2.0.7
2.0.8
2.0.9
2.0.9.post0
2.1.0rc0
2.1.0rc1
2.1.0
2.1.1
2.1.2
2.1.3
2.1.4
2.2.0rc0
2.2.0
2.2.0.post0
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.3.0.dev20240318
2.3.0.dev20240324
2.3.0.dev20240328
2.3.0.dev20240331
2.3.0.dev20240407
2.3.0.dev20240414
2.3.0.dev20240421
2.3.0.dev20240428
2.3.0.dev20240505
2.3.0.dev20240519
2.3.0.dev20240526
2.3.0.dev20240602
2.3.0.dev20240609
2.3.0.dev20240616
2.3.0.dev20240623
2.3.0
2.3.1
2.3.2

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/lightning/PYSEC-2026-385.yaml"