Vulnerability details
CVE-2026-33155
seperman deepdiff
DeepDiff has Memory Exhaustion DoS through SAFE_TO_IMPORT
CVSS 4.0
8.7High
Official description
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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| seperman | deepdiff | >= 5.0.0, < 8.6.2 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-03-20
- Last updated
- 2026-03-24
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.47%
Probability of exploitation in 30 days
40.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-400Uncontrolled Resource Consumption