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Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

MongoDBCVE-2026-82057

MongoDB Server: type confusion

MongoDB

CVE-2026-82057 · Published Sep 8, 2026 · updated Sep 16, 2026

High7.1
Fix: upgrade to 8.3.9 or later
MongoDB advisory

A security issue was discovered in MongoDB where an authenticated user with readWrite privileges could crash the mongod server process. By specifying a custom WiredTiger storage configuration option with an incompatible value during collection creation, a user could cause a type confusion in the storage engine layer. When documents were subsequently read from the misconfigured collection, the resulting mismatch in expected data format led to corrupted memory interpretation and a server crash. The crafted collection configuration persists across restarts, requiring manual operator intervention to remediate.

Affected versions

PackageAffectedFixed in
MongoDB Server
Product
>= 8.3.0, < 8.3.98.3.9
Details and references
CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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-843

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