mongo-c-driver 2.5.3

Announcing 2.5.3 of libbson and libmongoc, the libraries constituting the MongoDB C Driver.

libbson

No changes since 2.5.2. Version incremented to match the libmongoc version.

libmongoc

Fixes

• Use exact match for file ID in GridFS methods CVE-2026-88036
• Validate SASL username CVE-2026-88035

Links:

• All the issues resolved in 2.5.3
• Documentation

Thanks to everyone who contributed to this release.

• Connor MacDonald
• Kevin Albertson