CVE-2026-33155

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/qlustered/deepdiff/commit/0d07ec21d12b46ef4e489383b363eadc22d990fb	Patch
https://github.com/qlustered/deepdiff/security/advisories/GHSA-54jj-px8x-5w5q	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:qluster:deepdiff:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-20 21:17

Updated : 2026-06-17 10:37

NVD link : CVE-2026-33155

Mitre link : CVE-2026-33155

CVE.ORG link : CVE-2026-33155

JSON object : View

Products Affected

qluster

deepdiff

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-770

Allocation of Resources Without Limits or Throttling

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Algunos de los tipos en SAFE_TO_IMPORT tienen constructores que asignan memoria proporcional a su entrada (builtins.bytes, builtins.list, builtins.range). Una carga \u00fatil de pickle de 40 bytes puede forzar m\u00e1s de 10 GB de memoria, lo que provoca el bloqueo de aplicaciones que cargan objetos delta o llaman a pickle_load con datos no confiables. Este problema ha sido parcheado en la versi\u00f3n 8.6.2."}], "lastModified": "2026-06-17T10:37:02.550", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:qluster:deepdiff:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F297C465-900E-44A9-9697-7E3E001D9314", "versionEndExcluding": "8.6.2", "versionStartIncluding": "5.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}