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    2 vulnerabilities found for Libmongocrypt Driver by MongoDB

    CVE-2026-126792 (GCVE-0-2026-126792)

    Vulnerability from nvd – Published: 2026-11-12 23:53 – Updated: 2026-11-12 23:53
    VLAI
    Title
    Heap overflow via oversized RSA signature in GCP KMS signing callback
    Summary
    A memory-safety flaw in the key-management request-building component of the library can lead to an out-of-bounds write on the heap. A fixed-size output buffer is used under an assumption about cryptographic key size that is never validated, so when the library is embedded by a caller that supplies its own cryptographic callback implementation, data larger than the buffer can be written past its end. Exploitation requires the ability to control the embedding application's in-process key-management provider configuration, a high-privilege position. The demonstrated impact is memory corruption resulting in abnormal termination of the client process.
    Severity
    5.6 (Medium)
    CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
    4.7 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
    CWE
    Assigner
    mongodb CNA under the mitre root
    CNA scorecard C 70/100 over 262 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    MongoDB Libmongocrypt Driver Affected: 1.1.0 , ≤ 1.21.2 (python)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-126792 (GCVE-0-2026-126792)

    Vulnerability from cvelistv5 – Published: 2026-11-12 23:53 – Updated: 2026-11-12 23:53
    VLAI
    Title
    Heap overflow via oversized RSA signature in GCP KMS signing callback
    Summary
    A memory-safety flaw in the key-management request-building component of the library can lead to an out-of-bounds write on the heap. A fixed-size output buffer is used under an assumption about cryptographic key size that is never validated, so when the library is embedded by a caller that supplies its own cryptographic callback implementation, data larger than the buffer can be written past its end. Exploitation requires the ability to control the embedding application's in-process key-management provider configuration, a high-privilege position. The demonstrated impact is memory corruption resulting in abnormal termination of the client process.
    Severity
    5.6 (Medium)
    CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
    4.7 (Medium)
    CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
    CWE
    Assigner
    mongodb CNA under the mitre root
    CNA scorecard C 70/100 over 262 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    MongoDB Libmongocrypt Driver Affected: 1.1.0 , ≤ 1.21.2 (python)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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