{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-31250", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-05-11T15:38:07.637Z", "dateReserved": "2026-03-09T00:00:00.000Z", "datePublished": "2026-05-11T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-05-11T15:38:07.637Z"}, "descriptions": [{"lang": "en", "value": "CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its average_model.py model averaging tool. The script loads PyTorch checkpoint files (epoch_*.pt) for model averaging using torch.load() without enabling the weights_only=True security parameter. This allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing malicious checkpoint files within a directory. When a victim uses the tool to average models from this directory, arbitrary code is executed on the victim's system."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/FunAudioLLM/CosyVoice"}, {"url": "https://www.notion.so/CVE-2026-31250-35d1e13931888147a9a3e1c5e239a0a7"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}}, "dataVersion": "5.2"}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its average_model.py model averaging tool. The script loads PyTorch checkpoint files (epoch_*.pt) for model averaging using torch.load() without enabling the weights_only=True security parameter. This allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing malicious checkpoint files within a directory. When a victim uses the tool to average models from this directory, arbitrary code is executed on the victim's system."}], "id": "CVE-2026-31250", "lastModified": "2026-05-11T17:16:19.950", "metrics": {}, "published": "2026-05-11T17:16:19.950", "references": [{"source": "cve@mitre.org", "url": "https://github.com/FunAudioLLM/CosyVoice"}, {"source": "cve@mitre.org", "url": "https://www.notion.so/CVE-2026-31250-35d1e13931888147a9a3e1c5e239a0a7"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received"}

{}

{"created": "2026-05-11T17:45:26.343371+00:00", "title": "Insecure Deserialization in CosyVoice Model Averaging Tool Permits Arbitrary Code Execution", "updated": "2026-05-11T17:45:26.343387+00:00", "vendors": [], "weaknesses": ["CWE-502"]}