CVE-2026-96749

An integer overflow in the BSON document encoding component of the MongoDB Python Driver's bundled native extension may occur when a single document is built from an unusually large amount of caller-supplied data. Size arithmetic is performed in a signed 32-bit type, and the guard meant to catch the overflow is written in a form whose behavior is not defined by the C language standard. A party with no privileges who can place a very large value into data that an application encodes may, depending on how the native extension was built, cause a write outside the bounds of an allocated buffer inside the application's own process.

An integer overflow in the BSON document encoding component of the MongoDB Python Driver's bundled native extension may occur when a single document is built from an unusually large amount of caller-supplied data. Size arithmetic is performed in a signed 32-bit type, and the guard meant to catch the overflow is written in a form whose behavior is not defined by the C language standard. A party with no privileges who can place a very large value into data that an application encodes may, depending on how the native extension was built, cause a write outside the bounds of an allocated buffer inside the application's own process.

An integer overflow in the BSON document encoding component of the MongoDB Python Driver's bundled native extension may occur when a single document is built from an unusually large amount of caller-supplied data. Size arithmetic is performed in a signed 32-bit type, and the guard meant to catch the overflow is written in a form whose behavior is not defined by the C language standard. A party with no privileges who can place a very large value into data that an application encodes may, depending on how the native extension was built, cause a write outside the bounds of an allocated buffer inside the application's own process.

An integer overflow in the BSON document encoding component of the MongoDB Python Driver's bundled native extension may occur when a single document is built from an unusually large amount of caller-supplied data. Size arithmetic is performed in a signed 32-bit type, and the guard meant to catch the overflow is written in a form whose behavior is not defined by the C language standard. A party with no privileges who can place a very large value into data that an application encodes may, depending on how the native extension was built, cause a write outside the bounds of an allocated buffer inside the application's own process.

TuxCare rebuilt pymongo to address 2 CVEs. Fixed in 3.13.0.post2+tuxcare.

These are all security issues fixed in the python313-pymongo-4.18.2-1.1 package on the GA media of openSUSE Tumbleweed.

This update for python-pymongo fixes the following issues:

Changes in python-pymongo:

• CVE-2026-96749: integer overflow in BSON document encoding allows an unprivileged user to write outside the bounds of an allocated buffer (bsc#1282845)
• CVE-2026-96748: host injection in connection string leading to database connection redirection due to improper connection string parsing (bsc#1282827)
• CVE-2026-96747: improper handling of key management endpoint values ending in .sock allows users with write access to the encryption key metadata to open connections to local sockets on the application host (bsc#1282844)

Root has patched CVE-2026-96749 in the pymongo package for Root:PyPI. Multiple fixed versions available.

This update for python-pymongo fixes the following issues:

• CVE-2026-96747: improper handling of key management endpoint values ending in .sock allows users with write access to the encryption key metadata to open connections to local sockets on the application host (bsc#1282844).
• CVE-2026-96748: host injection in connection string leading to database connection redirection due to improper connection string parsing (bsc#1282827).
• CVE-2026-96749: integer overflow in BSON document encoding allows an unprivileged user to write outside the bounds of an allocated buffer (bsc#1282845).