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.
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References
| Link | Providers |
|---|---|
| https://jira.mongodb.org/browse/PYTHON-6110 |
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History
Thu, 08 Oct 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver | |
| Weaknesses | CWE-125 | |
| References |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: mongodb
Published:
Updated: 2026-10-08T20:12:15.074Z
Reserved: 2026-10-06T16:40:35.017Z
Link: CVE-2026-106435
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