{"cve":"CVE-2026-33155","nvd":{"published":"2026-03-20T21:17:15.910","modified":"2026-06-17T10:37:02.550","status":"Analyzed","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_v4":{"vector":"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","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770","CWE-400"],"references":["https://github.com/qlustered/deepdiff/commit/0d07ec21d12b46ef4e489383b363eadc22d990fb","https://github.com/qlustered/deepdiff/security/advisories/GHSA-54jj-px8x-5w5q"],"products":["qluster:deepdiff"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-33155","score":0.0046,"percentile":0.39936,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-54jj-px8x-5w5q","url":"https://osv.dev/vulnerability/GHSA-54jj-px8x-5w5q","summary":"DeepDiff has Memory Exhaustion DoS through SAFE_TO_IMPORT","modified":"2026-09-10T03:50:59.794940369Z","packages":[{"ecosystem":"PyPI","name":"deepdiff","purl":"pkg:pypi/deepdiff","ranges":[">=5.0.0 <8.6.2"],"fixed":["8.6.2"]}]},{"id":"PYSEC-2026-2445","url":"https://osv.dev/vulnerability/PYSEC-2026-2445","summary":"DeepDiff has Memory Exhaustion DoS through SAFE_TO_IMPORT","modified":"2026-07-13T16:31:43.813823082Z","packages":[{"ecosystem":"PyPI","name":"deepdiff","purl":"pkg:pypi/deepdiff","ranges":[">=5.0.0 <8.6.2"],"fixed":["8.6.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}