CVE-2026-33155 (GCVE-0-2026-33155)

Vulnerability from cvelistv5 – Published: 2026-03-20 20:25 – Updated: 2026-03-24 02:03
VLAI?
Title
DeepDiff has Memory Exhaustion DoS through SAFE_TO_IMPORT
Summary
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.
Severity ?
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
seperman deepdiff Affected: >= 5.0.0, < 8.6.2
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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