Security Advisory

CVE-2026-33155

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-20 20:25:53

Last updated 2026-03-24 02:03:16

Assigner GitHub_M

State PUBLISHED

Description

DeepDiff is a project focused on Deep Difference and search of any Python data. From version 5.0.0 to before version 8.6.2, the pickle unpickler _RestrictedUnpickler validates which classes can be loaded but does not limit their constructor arguments. A few of the types in SAFE_TO_IMPORT have constructors that allocate memory proportional to their input (builtins.bytes, builtins.list, builtins.range). A 40-byte pickle payload can force 10+ GB of memory, which crashes applications that load delta objects or call pickle_load with untrusted data. This issue has been patched in version 8.6.2.

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