MongoDBCVE-2026-82066
MongoDB Server: out-of-bounds read
Medium5.3CVE-2026-82066 · Published Sep 8, 2026 · updated Sep 16, 2026
A heap out-of-bounds read security issue exists in the query planning component of MongoDB Server. An authenticated user with database read and write privileges can trigger the security issue through crafted query operations, causing the server to read memory beyond allocated buffer boundaries. The revealed memory contents may be partially observable through diagnostic query statistics output.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| MongoDB Server Product | >= 8.3.0, < 8.3.9 | 8.3.9 |
| >= 8.0.0, < 8.0.30 | 8.0.30 | |
| >= 7.0.0, < 7.0.41 | 7.0.41 |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-125
More MongoDB advisories
All MongoDB| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 8 | MongoDB Server: weakly protected credentials | High7.1 | 8.3.9+2 more |
| Sep 8 | MongoDB Server: denial of service | High7.2 | 8.3.9 |
| Sep 8 | MongoDB Server: improper authorization | High7.1 | 8.3.9 |
| Sep 8 | MongoDB Server: improper authorization | High7.1 | 8.0.30+1 more |
| Sep 8 | MongoDB Server: resource exhaustion | High8.7 | 8.3.9+2 more |
| Sep 8 | MongoDB Server: integer overflow | High7.1 | 8.3.9+2 more |