CVE-2026-114648: high-severity vulnerability in MongoDB C# Driver
NoSQL injection via dot and dollar characters in LINQ filter field names and dictionary keys
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.2epss 0.3%
The MongoDB C# Driver does not neutralize dot and dollar characters in dictionary keys, field names and array-filter identifiers used in LINQ queries before placing them into the field paths it sends to the server. An application user whose input reaches these positions can redirect a query or update to fields the application did not name, which can expose other users' documents and widen updates beyond the intended data. Certain values can also write malformed fields that leave stored documents unreadable by the application until they are repaired.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Affected products
MongoDB · C# DriverRelated CVEs — MongoDB C# Driver
In the same product, most dangerous first.
CVE-2026-114644HIGHMemory-exhaustion denial of service via unbounded symbol interning during BSON/JSON deserializationEPSS 0.5%CVE-2026-88025MEDIUMGridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB C# DriverEPSS 0.5%CVE-2026-114643MEDIUMDuplicate geometry fields via unvalidated GeoJSON extra membersEPSS 0.4%CVE-2026-114651MEDIUMCross-document data leak via malformed BSON array parsing in reused thread bufferEPSS 0.4%CVE-2026-88026HIGHRegular expression injection via unescaped characters in LINQ query translation in MongoDB C# DriverEPSS 0.4%CVE-2026-114654MEDIUMBSON output corruption via out-of-range binary subtype bypassing UUID and OldBinary guardsEPSS 0.3%