← Vulnerability feed
Start free
Open in platform
Vulnerability record · CVE-2021-4118 · published 23 December 2021
CVE-2021-4118: Lightningai pytorch lightning deserialization of untrusted data vulnerability
Lightningai · Pytorch Lightning
pytorch-lightning is vulnerable to Deserialization of Untrusted Data
7.8 CVSS 3.1 High EPSS 0.98% · top 39.3% CWE-502 · Deserialization of untrusted data
7.8CVSS 3.1 base score, v2 6.8
0.98%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD
Description
pytorch-lightning is vulnerable to Deserialization of Untrusted Data
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.
References
| Link | Tags |
|---|---|
| https://github.com/pytorchlightning/pytorch-lightning/commit/62f1e82e032eb16565e676d39e0db0cac7e34ace | PatchThird Party Advisory |
| https://huntr.dev/bounties/31832f0c-e5bb-4552-a12c-542f81f111e6 | ExploitIssue TrackingPatchThird Party Advisory |
| https://github.com/pytorchlightning/pytorch-lightning/commit/62f1e82e032eb16565e676d39e0db0cac7e34ace | PatchThird Party Advisory |
| https://huntr.dev/bounties/31832f0c-e5bb-4552-a12c-542f81f111e6 | ExploitIssue TrackingPatchThird Party Advisory |
Track CVE-2021-4118 inside VULONE
Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.
Related vulnerabilities
Same products first, then exploited flaws of the same weakness class.
9.8CVE-2024-5980Lightningai pytorch lightning path traversal vulnerabilityA vulnerability in the /v1/runs API endpoint of lightning-ai/pytorch-lightning v2.2.4 allows attackers to exploit path traversal when extracting tar.…EPSS 1.3%9.8CVE-2024-5452Lightningai pytorch lightning mass assignment vulnerabilityA remote code execution (RCE) vulnerability exists in the lightning-ai/pytorch-lightning library version 2.2.1 due to improper handling of deserializ…EPSS 27%9.8CVE-2022-0845Lightningai pytorch lightning code injection vulnerabilityCode Injection in GitHub repository pytorchlightning/pytorch-lightning prior to 1.6.0.EPSS 1.00%9.3CVE-2026-44484Lightningai pytorch lightning inclusion from untrusted sphere vulnerabilityPyTorch Lightning is a deep learning framework to pretrain and finetune AI models. Versions 2.6.2 and 2.6.2 have introduced functionality consistent …EPSS 0.67%9.1CVE-2024-8019Lightningai pytorch lightning unrestricted file upload vulnerabilityIn lightning-ai/pytorch-lightning version 2.3.2, a vulnerability exists in the `LightningApp` when running on a Windows host. The vulnerability occur…EPSS 1.1%8.4CVE-2026-58659Lightningai pytorch lightning vulnerabilityPyTorch Lightning through 2.6.5, fixed in commit d710d68, contains a remote code execution vulnerability in the _load_state function that imports and…EPSS 0.63%7.8CVE-2026-31221Lightningai pytorch lightning deserialization of untrusted data vulnerabilityPyTorch-Lightning versions 2.6.0 and earlier contain an insecure deserialization vulnerability (CWE-502) in the checkpoint loading mechanism. The Lig…EPSS 0.55%7.5CVE-2024-8020Lightningai pytorch lightning vulnerabilityA vulnerability in lightning-ai/pytorch-lightning version 2.3.2 allows an attacker to cause a denial of service by sending an unexpected POST request…EPSS 0.63%
Source: NIST National Vulnerability Database (record CVE-2021-4118), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.
