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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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9912bf23f0207d3f369319b648c6202f564312a18516dd51572adf08c34d5d4c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"deepdiff","vendor":"seperman","versions":[{"status":"affected","version":">= 5.0.0, < 8.6.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7191b8cd236a75c11888f42a3e56813850acfec0dfc2d9bfb8689f97c5d9958e · sha256:d07d3d21709d813d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7191b8cd236a75c11888f42a3e56813850acfec0dfc2d9bfb8689f97c5d9958e · sha256:d07d3d21709d813d… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7191b8cd236a75c11888f42a3e56813850acfec0dfc2d9bfb8689f97c5d9958e · sha256:d07d3d21709d813d… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/qlustered/deepdiff/commit/0d07ec21d12b46ef4e489383b363eadc22d990fb","tags":["x_refsource_MISC"],"url":"https://github.com/qlustered/deepdiff/commit/0d07ec21d12b46ef4e489383b363eadc22d990fb"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7191b8cd236a75c11888f42a3e56813850acfec0dfc2d9bfb8689f97c5d9958e · sha256:d07d3d21709d813d… · /containers/cna/references/1
{"name":"https://github.com/qlustered/deepdiff/security/advisories/GHSA-54jj-px8x-5w5q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/qlustered/deepdiff/security/advisories/GHSA-54jj-px8x-5w5q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7191b8cd236a75c11888f42a3e56813850acfec0dfc2d9bfb8689f97c5d9958e · sha256:d07d3d21709d813d… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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