CVE-2026-33155
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
deepdiffPyPI | >= 5.0.0, < 8.6.2 | 8.6.2 |
Affected products
8- osv-coords7 versionspkg:apk/chainguard/dbt-bigquerypkg:apk/chainguard/dbt-corepkg:apk/chainguard/dbt-snowflakepkg:apk/chainguard/localstackpkg:pypi/deepdiffpkg:rpm/opensuse/python-deepdiff&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/python-deepdiff&distro=openSUSE%20Tumbleweed
< 1.10.3-r1+ 6 more
- (no CPE)range: < 1.10.3-r1
- (no CPE)range: < 1.11.8-r0
- (no CPE)range: < 1.10.4-r2
- (no CPE)range: < 4.14.0-r4
- (no CPE)range: >= 5.0.0, < 8.6.2
- (no CPE)range: < 6.3.0-150600.3.6.1
- (no CPE)range: < 8.6.2-1.1
Patches
Vulnerability mechanics
References
4- github.com/qlustered/deepdiff/commit/0d07ec21d12b46ef4e489383b363eadc22d990fbnvdPatchWEB
- github.com/qlustered/deepdiff/security/advisories/GHSA-54jj-px8x-5w5qnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-54jj-px8x-5w5qghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-33155ghsaADVISORY
News mentions
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