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    CVE-2026-81524

    A weakness in the MongoDB C Driver allows special elements in caller-supplied database and collection name components to pass without sanitization when the driver composes the target namespace for an operation. An application that incorporates untrusted input into these name components can have operations directed at a resource other than the one intended.

    Published:Aug 27, 2026
    Last Modified:Aug 28, 2026
    EPS:Aug 27, 2026
    EPSS Score:
    CVSS Score:5.4

    Affected Products

    Vendor
    Mongodb
    Product
    C Driver

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-84963 (CVSS 6.3) — An incorrect numeric conversion in the JSON parsing component of the MongoDB C Driver's BSON library may cause…
    CVE-2026-84964 (CVSS 8.2) — A double free in the OpenSSL-based TLS certificate revocation checking path of the MongoDB C Driver can be rea…
    CVE-2026-84965 (CVSS 5.9) — An integer wraparound in an allocation size calculation in the BSON library's JSON parsing code can cause a bu…
    CVE-2026-84969 (CVSS 6.3) — A memory-handling error in the BSON-to-JSON conversion helpers of the MongoDB C Driver can write a small numbe…
    CVE-2026-9100 (CVSS 6) — The MongoDB C Driver's legacy GridFS API accepts malformed file metadata from the database without adequate va…
    CVE-2026-6691 (CVSS 8.6) — The MongoDB C Driver's Cyrus SASL integration performs unsafe string copying during username canonicalization,…
    CVE-2026-6231 (CVSS 5.3) — The bson_validate function may return early on specific inputs and incorrectly report success. This behavior c…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High