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CVE-2026-114654

6.9 medium Awaiting Analysis
NVD · CVE.org

A numeric-type conversion flaw in the BSON handling library of the MongoDB C# Driver allows an out-of-range binary subtype value supplied through untrusted textual input to bypass the library's binary-element integrity checks. When such a value is later encoded, it is narrowed to a smaller wire representation, producing binary elements that misdeclare their type or length. An unauthenticated party able to supply text parsed by an affected application can cause it to emit and persist malformed binary data, which subsequent readers either reject with an error or silently interpret as shorter than the data that was validated.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 6

  1. StatusPublished → Awaiting AnalysisNVD modified 2026-10-23 19:45
  2. StatusReceived → PublishedNVD modified 2026-10-22 21:25
  3. References+1 references (now 3)NVD modified 2026-10-22 22:18
  4. StatusPublished → ReceivedNVD modified 2026-10-22 22:18
  5. StatusReceived → PublishedNVD modified 2026-10-22 19:13
  6. First seenCVSS 6.9NVD modified 2026-10-22 19:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3