High
deepdiff — security advisory
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.
- Products
- deepdiff
- Affected versions
- 3.3.0-1, 3.3.0-2, 3.3.0-2ubuntu1, 3.3.0-3, 5.6.0-2, 6.2.2-1, 6.7.1-1, 8.1.1-3, 8.1.1-4, 8.6.1-1, 9.0.0-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-33155
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:07 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-33155
deepdiff
Fixed versions: Not specified
deepdiff
Fixed versions: Not specified
deepdiff
Fixed versions: Not specified
deepdiff
Fixed versions: Not specified
deepdiff
Fixed versions: Not specified
deepdiff
Fixed versions: Not specified
Complete source record
{
"id": "1cd1e27e1ced60d2e12e18758c847984a50cc1fcbf877e97ac13cf416731c1ec",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-33155",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-33155",
"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.",
"evidence": "osv:UBUNTU-CVE-2026-33155",
"products": [
{
"name": {
"value": "deepdiff",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.3.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.3.0-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "deepdiff",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.3.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "3.3.0-2ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "3.3.0-3",
"evidence": "/affected/1/versions"
},
{
"value": "5.6.0-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "deepdiff",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.2.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.7.1-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "deepdiff",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "8.1.1-3",
"evidence": "/affected/3/versions"
},
{
"value": "8.1.1-4",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "deepdiff",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "8.6.1-1",
"evidence": "/affected/4/versions"
},
{
"value": "9.0.0-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "deepdiff",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "8.1.1-4",
"evidence": "/affected/5/versions"
},
{
"value": "8.6.1-1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-33155",
"aliases": [
"UBUNTU-CVE-2026-33155"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "deepdiff",
"purl": "pkg:deb/ubuntu/deepdiff?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"3.3.0-1",
"3.3.0-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33155.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-deepdiff",
"binary_version": "3.3.0-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "deepdiff",
"purl": "pkg:deb/ubuntu/deepdiff?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"3.3.0-2",
"3.3.0-2ubuntu1",
"3.3.0-3",
"5.6.0-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33155.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-deepdiff",
"binary_version": "5.6.0-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "deepdiff",
"purl": "pkg:deb/ubuntu/deepdiff?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"6.2.2-1",
"6.7.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33155.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-deepdiff",
"binary_version": "6.7.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "deepdiff",
"purl": "pkg:deb/ubuntu/deepdiff?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"8.1.1-3",
"8.1.1-4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33155.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-deepdiff",
"binary_version": "8.1.1-4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
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],
"package": {
"name": "deepdiff",
"purl": "pkg:deb/ubuntu/deepdiff?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"8.6.1-1",
"9.0.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33155.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-deepdiff",
"binary_version": "9.0.0-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "deepdiff",
"purl": "pkg:deb/ubuntu/deepdiff?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"8.1.1-4",
"8.6.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33155.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-deepdiff",
"binary_version": "8.6.1-1"
}
]
}
}
],
"modified": "2026-10-17T12:58:10.438044472Z",
"provider": "osv",
"upstream": [
"CVE-2026-33155"
],
"references": [
"https://ubuntu.com/security/CVE-2026-33155",
"https://www.cve.org/CVERecord?id=CVE-2026-33155",
"https://github.com/qlustered/deepdiff/commit/0d07ec21d12b46ef4e489383b363eadc22d990fb",
"https://github.com/qlustered/deepdiff/security/advisories/GHSA-54jj-px8x-5w5q"
]
},
"related_cves": [
{
"value": "CVE-2026-33155",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 358271,
"published_at": "2026-03-20T21:17:00+00:00"
}