{"id":"CVE-2021-4118","aliases":["GHSA-2vj5-px25-gjrp","PYSEC-2021-874","PYSEC-2026-3968"],"title":"pytorch-lightning is vulnerable to Deserialization of Untrusted Data","summary":"pytorch-lightning is vulnerable to Deserialization of Untrusted Data","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","vendor":"pytorch-lightning","product":"pytorch-lightning","ecosystem":"pip","affected":["pytorch-lightning < 1.6.0"],"patched":["pytorch-lightning 1.6.0"],"published":"2022-01-06","updated":"2026-09-10","sourceUpdated":"2026-09-10T17:26:03.425101162Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-2vj5-px25-gjrp","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4118"},{"url":"https://github.com/PyTorchLightning/pytorch-lightning/issues/11045"},{"url":"https://github.com/PyTorchLightning/pytorch-lightning/pull/11099"},{"url":"https://github.com/pytorchlightning/pytorch-lightning/commit/62f1e82e032eb16565e676d39e0db0cac7e34ace"},{"url":"https://github.com/PyTorchLightning/pytorch-lightning/releases/tag/1.6.0"},{"url":"https://github.com/advisories/GHSA-2vj5-px25-gjrp"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/pytorch-lightning/PYSEC-2021-874.yaml"},{"url":"https://github.com/pytorchlightning/pytorch-lightning"},{"url":"https://huntr.dev/bounties/31832f0c-e5bb-4552-a12c-542f81f111e6"}],"tags":["osv","pip"],"epss":0.00978,"epssPercentile":0.60681,"ingestedAt":"2026-09-12T03:13:01.640Z","slug":"CVE-2021-4118","body":"## Overview\n\npytorch-lightning is vulnerable to Deserialization of Untrusted Data.\n\n## Affected packages\n\n- `pytorch-lightning < 1.6.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `pytorch-lightning 1.6.0`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}