CVE-2026-84965

CVE-2026-84965 affects the BSON library within the MongoDB C Driver (tracked as CDRIVER-6405 ). An integer wraparound in an allocation size calculation during JSON parsing can cause a buffer to be freed while a subsequent copy still writes through the stale pointer (use-after-free). This is explo...

CVE-2026-84966

An incorrect numeric type conversion in the BSON document building component of the MongoDB C++ Driver may cause a length value to be interpreted incorrectly. When an application passes an extremely large, non-terminated field name to the builder, the library may read memory outside the intended ...

EUVD-2026-70511

An incorrect numeric type conversion in the BSON document building component of the MongoDB C++ Driver may cause a length value to be interpreted incorrectly. When an application supplies an extremely large, non-terminated field name to the builder, the library may read memory outside the intende...

CVE-2026-84966

An incorrect numeric type conversion in the BSON document building component of the MongoDB C++ Driver may cause a length value to be interpreted incorrectly. When an application supplies an extremely large, non-terminated field name to the builder, the library may read memory outside the intende...

BSON element injection via NUL-embedded document keys in builder append

An incorrect numeric type conversion in the BSON document building component of the MongoDB C++ Driver may cause a length value to be interpreted incorrectly. When an application supplies an extremely large, non-terminated field name to the builder, the library may read memory outside the intende...

CVE-2026-84969

A memory-handling error in the BSON-to-JSON conversion helpers of the MongoDB C Driver can write a small number of bytes past the end of a heap buffer when a binary field is encoded and the output is cut short at a caller-configured length limit. A party who supplies the document content, with no...

Heap overflow via truncated base64 encoding of binary fields in length-limited JSON output

A memory-handling error in the BSON-to-JSON conversion helpers of the MongoDB C Driver can write a small number of bytes past the end of a heap buffer when a binary field is encoded and the output is cut short at a caller-configured length limit. A party who supplies the document content, with no...

EUVD-2026-70508

A memory-handling error in the BSON-to-JSON conversion helpers of the MongoDB C Driver can write a small number of bytes past the end of a heap buffer when a binary field is encoded and the output is cut short at a caller-configured length limit. A party who supplies the document content, with no...

CVE-2026-84969

CVE-2026-84969 is a heap buffer overflow in the BSON-to-JSON conversion helpers of the MongoDB C Driver . The root cause is a truncated Base64 encoding of a binary field when the output is cut short at a caller-configured length limit, causing a small number of bytes to be written past the end of...

EUVD-2026-70505

A numeric truncation weakness exists in the JSON parsing component of the MongoDB C++ Driver's BSON library. An actor who controls the text that an embedding application hands to the library's public JSON parsing interface, when that text is very large, can cause the library to read memory beyond...

CVE-2026-84970

A numeric truncation (32-bit length truncation) in the JSON parsing component of the MongoDB C++ Driver's BSON library allows a local attacker to supply an oversized JSON string to the library's public parsing interface, causing a heap over-read (out-of-bounds memory returned to the caller), a si...

CVE-2026-84970 Heap over-read or silent misparse via 32-bit truncation of JSON length in BSON JSON parser

A numeric truncation weakness exists in the JSON parsing component of the MongoDB C++ Driver's BSON library. An actor who controls the text that an embedding application hands to the library's public JSON parsing interface, when that text is very large, can cause the library to read memory beyond...

CVE-2026-84970

A numeric truncation weakness exists in the JSON parsing component of the MongoDB C++ Driver's BSON library. An actor who controls the text that an embedding application hands to the library's public JSON parsing interface, when that text is very large, can cause the library to read memory beyond...

Heap over-read or silent misparse via 32-bit truncation of JSON length in BSON JSON parser

A numeric truncation weakness exists in the JSON parsing component of the MongoDB C++ Driver's BSON library. An actor who controls the text that an embedding application hands to the library's public JSON parsing interface, when that text is very large, can cause the library to read memory beyond...

PT-2026-85072

Name of the Vulnerable Software and Affected Versions MongoDB C Driver affected versions not specified Description A memory-handling error exists in the BSON-to-JSON conversion helpers. This issue occurs when a binary field is encoded and the output is truncated at a length limit configured by th...

PT-2026-85069

An integer wraparound in an allocation size calculation in the BSON library's JSON parsing code can cause a buffer to be released while a following copy operation still writes through the stale pointer. On builds where sizes are 32 bits, an unauthenticated party able to supply a sufficiently larg...

PT-2026-85067

Name of the Vulnerable Software and Affected Versions MongoDB C Driver affected versions not specified Description An incorrect numeric conversion in the JSON parsing component of the BSON library allows an unauthenticated party to supply input that causes unusually large text values to be silent...

Astra Linux – Vulnerability in mongo-c-driver

The bsonstringappend function in the MongoDB C Driver may be vulnerable to a buffer overflow. In this scenario, the function might attempt to allocate a buffer that is too small, which could lead to memory corruption in the neighboring heap memory. This issue affects versions of libbson prior to...

Astra Linux – Vulnerability in mongo-c-driver

When calling bsonutf8validate on certain inputs, it is possible for an infinite loop to occur, with no way to exit. This issue affects All MongoDB C Driver versions prior to version 1.25.0...

Astra Linux – Vulnerability in mongo-c-driver

The various bsonappend functions in the MongoDB C driver library may be susceptible to buffer overflows when performing operations that could result in a final BSON document exceeding the maximum allowable size INT32MAX, leading to a segmentation fault and potentially causing the application to...