PyMongo: PYTHON-5996 Heap out-of-bounds write via signed size overflow in BSON document encoding
High-risk advisory
CVE-2026-96749
Summary
PyMongo: PYTHON-5996 Heap out-of-bounds write via signed size overflow in BSON document encoding
Why it matters
GitHub has published a reviewed security advisory for pymongo. Prioritize it with other application dependency updates, especially because EPSS places it in the 2% percentile.
Operator check
Check whether pymongo is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 7.5. EPSS probability: 0.1%; percentile: 2%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.