CVE-2026-114654
mediumpriority · track · 0EPSS 0.003 · 28 %ileFREPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.7–6.9
weaknesses
The CWE weakness classes this flaw belongs to.
affected products
Products and version ranges known to be affected.
No affected products recorded.
advisories (1)
Vendor and ecosystem advisories describing this.
- CERTFR-2026-AVI-1386Multiples vulnérabilités dans les produits MongoDBFrançais2026-10-26vendor · certfrFR
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
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