pymongo: The MongoDB Python Driver's binary accelerator can read outside a buffer when an application decodes malformed BSON c...
CVE-2026-106435 is fixed in pymongo on 1 platform by DEBIAN-CVE-2026-106435 (version 4.19.0-1), released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.
The MongoDB Python Driver's binary accelerator can read outside a buffer when an application decodes malformed BSON containing a truncated regular-expression element without a trailing NUL byte. An actor who can supply BSON to the documented decode or decode_all API can cause the application process to terminate when the C extension is loaded. The driver's normal database wire-protocol path does not reach this code.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| pymongo · Debian 14 | 4.19.0-1 | DEBIAN-CVE-2026-106435 | Oct 24, 2026 |
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