{"id":"CVE-2026-24747","aliases":["BIT-pytorch-2026-24747","GHSA-63cw-57p8-fm3p","PYSEC-2026-1856","PYSEC-2026-2286"],"url":"https://o3.security/vulnerability/CVE-2026-24747","summary":"PyTorch Vulnerable to Remote Code Execution via Untrusted Checkpoint Files","details":"### Summary\n\nA vulnerability in PyTorch's `weights_only` unpickler allows an attacker to craft a malicious checkpoint file (`.pth`) that, when loaded with `torch.load(..., weights_only=True)`, can corrupt memory and potentially lead to arbitrary code execution.\n\n### Vulnerability Details\n\nThe `weights_only=True` unpickler failed to properly validate pickle opcodes and storage metadata, allowing:\n\n1. **Heap memory corruption** via `SETITEM`/`SETITEMS` opcodes applied to non-dictionary types\n2. **Storage size mismatch** between declared element count and actual data in the archive\n\n### Impact\n\nAn attacker who can convince a user to load a malicious checkpoint file may achieve arbitrary code execution in the context of the victim's process.\n\n\n# Credit\nJi'an Zhou","published":"2026-01-27T21:13:46.878Z","modified":"2026-10-28T03:00:05.164003592Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":{"score":0.00706,"percentile":0.50998,"asOf":"2026-09-04"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"pytorch","fixedVersion":"2.10.0"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/pytorch/pytorch/releases/tag/v2.10.0"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24747.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:24977"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-24747"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24747.json"},{"type":"ADVISORY","url":"https://github.com/pytorch/pytorch/security/advisories/GHSA-63cw-57p8-fm3p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24747"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2433612"},{"type":"REPORT","url":"https://github.com/pytorch/pytorch/issues/163105"},{"type":"FIX","url":"https://github.com/pytorch/pytorch/163122/commit/954dc5183ee9205cbe79876ad05dd2d9ae752139"},{"type":"PACKAGE","url":"https://github.com/pytorch/pytorch"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T03:00:05.164003592Z"}}