CVE-2026-106438Silent Decimal128 value corruption via incorrect exactness check in MongoDB C Driver
Updated under an hour ago ()
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It affects MongoDB C Driver. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-682
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mongodb
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
MongoDB C Driver mongodb:c_driver (from the name) | from 1.4.0 before 1.30.13; from 2.0.0 before 2.5.6 | CNA record |
References
- https://jira.mongodb.org/browse/CDRIVER-6419
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.