CVE-2024-5452
RCE via Property/Class Pollution in lightning-ai/pytorch-lightning
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
9.8
RCE via Property/Class Pollution in lightning-ai/pytorch-lightning
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.
- Record
CVE-2024-5452- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-915
- Updated
- 2026-11-02
EUVDEUVD-2024-2023
9.8
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.
- Record
EUVD-2024-2023- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-cgwc-qvrx-rf7f
9.8
Remote code execution in pytorch lightning
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.
- Record
GHSA-cgwc-qvrx-rf7f- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-913, CWE-915
- Updated
- 2026-11-02
NVD
9.8
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.
- Record
CVE-2024-5452- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-915, CWE-913
- Updated
- 2026-11-02
OSV
9.8
RCE via Property/Class Pollution in lightning-ai/pytorch-lightning
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.
- Record
CVE-2024-5452- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-915
- Updated
- 2026-11-02
OSVGHSA-cgwc-qvrx-rf7f
9.8
Remote code execution in pytorch lightning
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.
- Record
GHSA-cgwc-qvrx-rf7f- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-913, CWE-915
- Updated
- 2026-11-02
OSVPYSEC-2026-385
9.8
Remote code execution in pytorch lightning
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.
- Record
PYSEC-2026-385- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVPYSEC-2026-3974
9.8
Remote code execution in pytorch lightning
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.
- Record
PYSEC-2026-3974- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
lightningPyPI |
before 2.3.3 | 2.3.3 |
lightningPyPI |
before 2.3.3, plus listed versions 1.8.01.8.0.post11.8.0rc11.8.0rc21.8.1 Show 45 moreShow less1.8.21.8.31.8.3.post01.8.3.post11.8.3.post21.8.41.8.4.post01.8.51.8.5.post01.8.61.9.01.9.0rc01.9.11.9.21.9.31.9.41.9.52.0.02.0.0rc02.0.12.0.1.post02.0.22.0.32.0.42.0.52.0.62.0.72.0.82.0.92.0.9.post02.1.02.1.0rc02.1.0rc12.1.12.1.22.1.32.1.42.2.02.2.0.post02.2.0rc02.2.12.2.22.2.32.2.42.2.5 |
2.3.3 |
pytorch-lightningPyPI |
before 2.3.3, plus listed versions 0.0.20.10.00.20.2.20.2.3 Show 45 moreShow less0.2.40.2.4.10.2.50.2.5.10.2.5.20.2.60.30.3.10.3.20.3.30.3.40.3.4.10.3.50.3.60.3.6.10.3.6.30.3.6.40.3.6.50.3.6.60.3.6.70.3.6.80.3.6.90.4.00.4.10.4.20.4.30.4.40.4.50.4.60.4.70.4.80.4.90.5.00.5.10.5.1.20.5.1.30.5.20.5.2.10.5.30.5.3.10.5.3.20.5.3.30.6.00.7.10.7.3 |
2.3.3 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | skrkcb2/CVE-2024-5452 | 2025-02-09 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-5452 is a critical vulnerability (CVSS 9.8) in Lightning-ai Lightning-ai/pytorch-lightning, published June 6, 2024. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 26.8%, the 98th percentile. Fixed in lightning 2.3.3.
References
huntr.com/bounties/486add92-275e-4a7b-92f9-42d84bc759da
github.com/lightning-ai/pytorch-lightning/commit/330af381de88cff17515418a341cbc1f9f127f9a
nvd.nist.gov/vuln/detail/CVE-2024-5452
github.com/Lightning-AI/pytorch-lightning/releases/tag/2.3.3
github.com/Lightning-AI/pytorch-lightning/issues/20038
github.com/advisories/GHSA-cgwc-qvrx-rf7f
github.com/CVEProject/cvelistV5/tree/main/cves/2024/5xxx/CVE-2024-5452.json
github.com/lightning-ai/pytorch-lightning
pypi.org/project/lightning
Left out here: 185 versions. The JSON record has them.