What’s Vulnerable › Vulnerabilities

CVE-2021-4118: Deserialization of Untrusted Data in pytorchlightning/pytorch-lightning

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-23 · updated 2026-06-17
• Weakness: CWE-502

Description

pytorch-lightning is vulnerable to Deserialization of Untrusted Data

Affected products

• lightning-ai/pytorch-lightning: before 1.6.0 — fixed in 1.6.0

How to fix

Upgrade to a fixed version: lightning-ai/pytorch-lightning 1.6.0. Check the vendor advisory for mitigations.

References

• https://github.com/pytorchlightning/pytorch-lightning/commit/62f1e82e032eb16565e676d39e0db0cac7e34ace
• https://huntr.dev/bounties/31832f0c-e5bb-4552-a12c-542f81f111e6
• https://github.com/pytorchlightning/pytorch-lightning/commit/62f1e82e032eb16565e676d39e0db0cac7e34ace
• https://huntr.dev/bounties/31832f0c-e5bb-4552-a12c-542f81f111e6

Get alerted when CVE-2021-4118 or the next vulnerability affects your stack