| Title | dask ≤2026.8.0 rce |
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| Description | to_npy_stack/from_npy_stack is the documented on-disk array stack format: a directory of 0.npy, 1.npy, ... chunks plus a single info metadata file. The loader deserializes that metadata file with a bare pickle.load. The stack directory is an explicitly shareable dataset format (copy/ship the directory), and mmap_mode only selects memory mapping. No parameter of the call, no dask config key, and no environment variable can block the deserialization — anyone who can supply or tamper a stack directory executes arbitrary code on every worker that reads it. Raw pickle.load is unaffected by TORCH_FORCE_WEIGHTS_ONLY_LOAD. |
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| Source | ⚠️ https://github.com/dask/dask/issues/12578 |
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| User | __lbz__ (UID 100868) |
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| Submission | 08/30/2026 07:20 (24 days ago) |
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| Moderation | 09/22/2026 19:07 (23 days later) |
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| Status | Accepted |
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| VulDB entry | 408543 [Dask up to 2026.8.0 Loader dask/array/core.py from_npy_stack deserialization] |
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| Points | 19 |
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