CVE-2026-114652: high-severity vulnerability in MongoDB C# Driver
Update operator injection via single-element list rewriting in the update builder
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.3%
A data-query-logic neutralization weakness in the update-statement construction component of the MongoDB C# Driver can cause application-supplied values to be interpreted as query/update logic rather than as literal data. An application user who can influence the content of values that the application passes into the affected builder surface, without any special privilege beyond ordinary read-write application access, may cause stored data to be modified or removed in ways the application never intended. The result is unauthorized integrity impact on the affected application data; there is no direct loss of confidentiality or availability of the database service.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/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%