mongo-c-driver 2.5.2

Announcing 2.5.2 of libbson and libmongoc, the libraries constituting the MongoDB C Driver.

libbson

No changes since 2.5.1. Version incremented to match the libmongoc version.

libmongoc

Fixes

• Fix OCSP error handling. CVE-2026-84964
• Fix unsafe casts during JSON parsing. CVE-2026-84965
• Fix possible unsafe truncation when logging base64. CVE-2026-84969
• Fix unsafe calls to bson_next_power_of_two. CVE-2026-84963

Links:

• All the issues resolved in 2.5.2
• Documentation