Directory Traversal Affecting vllm-cu129 package, versions <0.22.1-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-MINIMOSLATEST-VLLMCU129-19503527
- published3 Sept 2026
- disclosed2 Aug 2026
Introduced: 2 Aug 2026
CVE-2026-9856 (opens in a new tab)How to fix?
Upgrade Minimos:latest vllm-cu129 to version 0.22.1-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream vllm-cu129 package and not the vllm-cu129 package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
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.
References
- https://www.cve.org/CVERecord?id=CVE-2026-9856
- https://github.com/advisories/GHSA-xrqw-3rrv-vx5w
- https://osv.dev/vulnerability/MINI-h559-7p2f-hm8g
- https://osv.dev/vulnerability/CVE-2026-9856
- https://github.com/huggingface/transformers/commit/eaaaf8494dd5386634ae37d1d122212fdc315be5
- https://huntr.com/bounties/362824d5-fe18-40e8-a6cf-62277f97a170