{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-1839","assignerOrgId":"c09c270a-b464-47c1-9133-acb35b22c19a","state":"PUBLISHED","assignerShortName":"@huntr_ai","dateReserved":"2026-02-03T16:49:27.781Z","datePublished":"2026-04-07T05:22:00.959Z","dateUpdated":"2026-04-07T13:27:41.789Z"},"containers":{"cna":{"title":"Arbitrary Code Execution via Unsafe torch.load() in Trainer Checkpoint Loading in huggingface/transformers","providerMetadata":{"orgId":"c09c270a-b464-47c1-9133-acb35b22c19a","shortName":"@huntr_ai","dateUpdated":"2026-04-07T05:22:00.959Z"},"descriptions":[{"lang":"en","value":"A vulnerability in the HuggingFace Transformers library, specifically in the `Trainer` class, allows for arbitrary code execution. The `_load_rng_state()` method in `src/transformers/trainer.py` at line 3059 calls `torch.load()` without the `weights_only=True` parameter. This issue affects all versions of the library supporting `torch>=2.2` when used with PyTorch versions below 2.6, as the `safe_globals()` context manager provides no protection in these versions. An attacker can exploit this vulnerability by supplying a malicious checkpoint file, such as `rng_state.pth`, which can execute arbitrary code when loaded. The issue is resolved in version v5.0.0rc3."}],"affected":[{"vendor":"huggingface","product":"huggingface/transformers","versions":[{"version":"unspecified","lessThan":"v5.0.0rc3","status":"affected","versionType":"custom"}]}],"references":[{"url":"https://huntr.com/bounties/3c77bb97-e493-493d-9a88-c57f5c536485"},{"url":"https://github.com/huggingface/transformers/commit/03c8082ba4594c9b8d6fe190ca9bed0e5f8ca396"}],"metrics":[{"cvssV3_0":{"version":"3.0","attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:H","baseScore":6.5,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-502 Deserialization of Untrusted Data","cweId":"CWE-502"}]}],"source":{"advisory":"3c77bb97-e493-493d-9a88-c57f5c536485","discovery":"EXTERNAL"}},"adp":[{"references":[{"url":"https://huntr.com/bounties/3c77bb97-e493-493d-9a88-c57f5c536485","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-07T13:27:38.099805Z","id":"CVE-2026-1839","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-07T13:27:41.789Z"}}]}}