PyMongo 4.18.2 Released

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We are pleased to announce the 4.18.2 release of PyMongo - MongoDB’s Python Driver.

Changes in 4.18.2

Version 4.18.2 is a bug fix release.

  • Hardened the bson buffer size guard against signed integer overflow. (CVE-2026-96749)

  • Fixed connection string parsing to percent-decode each host individually. (CVE-2026-96748)

  • Client-side field level encryption now rejects a KMS endpoint ending in .sock. (CVE-2026-96747)

Issues Resolved

See the PyMongo 4.18.2 release notes in JIRA for the list of resolved issues in this release.

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