mongo-c-driver: An incorrect calculation in Decimal128 string parsing in the MongoDB C Driver can accept certain over-precision input...
CVE-2026-106438 is fixed in mongo-c-driver on 1 platform by DEBIAN-CVE-2026-106438 (version 2.5.6-1), released October 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.
An incorrect calculation in Decimal128 string parsing in the MongoDB C Driver can accept certain over-precision inputs containing leading zeros instead of rejecting them. This produces a value different from the supplied text. An actor who can provide a decimal string to an embedding application, including through Extended JSON parsing, can cause the application to store or use an incorrect numeric value.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| mongo-c-driver · Debian 14 | 2.5.6-1 | DEBIAN-CVE-2026-106438 | Oct 16, 2026 |
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