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.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33155.json"
}

References

Affected packages

Git / github.com/qlustered/deepdiff

Affected ranges

Type

GIT

Repo

https://github.com/qlustered/deepdiff

Events

Introduced

15a99abefd93de22367f1bb9fec228b4dd0675f6

Fixed

0d07ec21d12b46ef4e489383b363eadc22d990fb

Database specific

Show details

{
    "cpe": "cpe:2.3:a:qluster:deepdiff:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "5.0.0"
        },
        {
            "fixed": "8.6.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

5.*

5.0.0

5.0.2

5.2.1

5.2.2

5.2.3

5.3.0

5.5.0

5.6.0

5.8.0

6.*

6.0.0

6.1.0

6.2.1

6.2.2

6.3.0

6.3.1

6.4.0

6.4.1

6.6.0

6.7.1

7.*

7.0.1

8.*

8.0.0

8.0.1

8.1.0

8.1.1

8.2.0

8.3.0

8.4.0

8.4.1

8.5.0

8.6.0

8.6.1

v5.*

v5.8.1

v5.8.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33155.json"