{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-11-02T23:35:13.254","vulnerabilities":[{"cve":{"id":"CVE-2026-9856","sourceIdentifier":"security@huntr.dev","published":"2026-08-02T16:16:25.413","lastModified":"2026-10-23T22:10:00.160","vulnStatus":"Awaiting Analysis","cveTags":[],"descriptions":[{"lang":"en","value":"A vulnerability in huggingface/transformers versions <=5.8.0.dev0 allows an attacker to perform arbitrary file writes via path traversal. The issue resides in the `save_pretrained()` methods of `PreTrainedTokenizerBase` and `ProcessorMixin`, where keys from the `chat_template` dictionary are used directly as filenames without proper validation. An attacker can exploit this by publishing a malicious Hugging Face Hub repository with a crafted `tokenizer_config.json` file. When a victim downloads and saves the tokenizer or processor, the attacker-controlled keys can escape the intended save directory, enabling arbitrary file writes with attacker-controlled content. This vulnerability affects multiple processors inheriting from `ProcessorMixin`, including Idefics, Florence, Gemma, Phi, and Qwen-VL."},{"lang":"es","value":"Una vulnerabilidad en las versiones menor o igual que 5.8.0.dev0 de huggingface/transformers permite a un atacante realizar escrituras de archivos arbitrarias mediante salto de ruta. El problema reside en los métodos ’save_pretrained()’ de ’PreTrainedTokenizerBase’ y ’ProcessorMixin’, donde las claves del diccionario ’chat_template’ se utilizan directamente como nombres de archivo sin una validación adecuada. Un atacante puede explotar esto publicando un repositorio malicioso en Hugging Face Hub con un archivo ’tokenizer_config.json’ manipulado. Cuando una víctima descarga y guarda el tokenizador o procesador, las claves controladas por el atacante pueden escapar del directorio de guardado previsto, permitiendo escrituras de archivos arbitrarias con contenido controlado por el atacante. Esta vulnerabilidad afecta a múltiples procesadores que heredan de ’ProcessorMixin’, incluyendo Idefics, Florence, Gemma, Phi y Qwen-VL."}],"affected":[{"source":"security@huntr.dev","affectedData":[{"vendor":"huggingface","product":"huggingface/transformers","versions":[{"version":"unspecified","lessThan":"5.10.0","versionType":"custom","status":"affected"}]}]}],"metrics":{"cvssMetricV30":[{"source":"security@huntr.dev","type":"Secondary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"LOW"},"exploitabilityScore":2.8,"impactScore":4.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-03T14:57:31.978427Z","id":"CVE-2026-9856","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security@huntr.dev","type":"Secondary","description":[{"lang":"en","value":"CWE-22"}]}],"references":[{"url":"https://github.com/huggingface/transformers/commit/eaaaf8494dd5386634ae37d1d122212fdc315be5","source":"security@huntr.dev"},{"url":"https://huntr.com/bounties/362824d5-fe18-40e8-a6cf-62277f97a170","source":"security@huntr.dev"}]}}]}