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    4 vulnerabilities found for libmongocrypt by MongoDB

    CVE-2026-81523 (GCVE-0-2026-81523)

    Vulnerability from nvd – Published: 2026-08-27 18:32 – Updated: 2026-08-28 15:51
    VLAI
    Title
    Cross-tenant database retargeting via dot/NUL injection in namespace strings in libmongocrypt
    Summary
    A missing input-validation issue in MongoDB libmongocrypt's automatic-encryption context setup allows a caller-supplied database identifier to be accepted without sanitization. The resulting impact is limited to incorrect schema selection, which may lead to limited disclosure or modification of information handled by the application.
    Severity
    2 (Low)
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
    4.4 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-28 15:50 UTC
    CWE
    • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
    Assigner
    References
    Impacted products
    Vendor Product Version
    MongoDB libmongocrypt Affected: 1.0.0 , < 1.20.3 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2021-20327 (GCVE-0-2021-20327)

    Vulnerability from nvd – Published: 2021-02-25 16:25 – Updated: 2024-09-16 19:24
    VLAI
    Title
    MongoDB Node.js client side field level encryption library may not be validating KMS certificate
    Summary
    A specific version of the Node.js mongodb-client-encryption module does not perform correct validation of the KMS server’s certificate. This vulnerability in combination with a privileged network position active MITM attack could result in interception of traffic between the Node.js driver and the KMS service rendering client-side field level encryption (CSFLE) ineffective. This issue was discovered during internal testing and affects mongodb-client-encryption module version 1.2.0, which was available from 2021-Jan-29 and deprecated in the NPM Registry on 2021-Feb-04. This vulnerability does not impact driver traffic payloads with CSFLE-supported key services from applications residing inside the AWS, GCP, and Azure nework fabrics due to compensating controls in these environments. This issue does not impact driver workloads that don’t use Field Level Encryption. This issue affect MongoDB Node.js Driver mongodb-client-encryption module version 1.2.0
    Severity
    6.4 (Medium)
    CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
    CWE
    • CWE-295 - Improper Certificate Validation
    Assigner
    References
    URL Tags
    https://jira.mongodb.org/browse/NODE-3125 x_refsource_MISC
    Impacted products
    Date Public
    2021-02-25 00:00
    Show details on NVD website
    To clipboard 

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    CVE-2026-81523 (GCVE-0-2026-81523)

    Vulnerability from cvelistv5 – Published: 2026-08-27 18:32 – Updated: 2026-08-28 15:51
    VLAI
    Title
    Cross-tenant database retargeting via dot/NUL injection in namespace strings in libmongocrypt
    Summary
    A missing input-validation issue in MongoDB libmongocrypt's automatic-encryption context setup allows a caller-supplied database identifier to be accepted without sanitization. The resulting impact is limited to incorrect schema selection, which may lead to limited disclosure or modification of information handled by the application.
    Severity
    2 (Low)
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
    4.4 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-28 15:50 UTC
    CWE
    • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
    Assigner
    References
    Impacted products
    Vendor Product Version
    MongoDB libmongocrypt Affected: 1.0.0 , < 1.20.3 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2021-20327 (GCVE-0-2021-20327)

    Vulnerability from cvelistv5 – Published: 2021-02-25 16:25 – Updated: 2024-09-16 19:24
    VLAI
    Title
    MongoDB Node.js client side field level encryption library may not be validating KMS certificate
    Summary
    A specific version of the Node.js mongodb-client-encryption module does not perform correct validation of the KMS server’s certificate. This vulnerability in combination with a privileged network position active MITM attack could result in interception of traffic between the Node.js driver and the KMS service rendering client-side field level encryption (CSFLE) ineffective. This issue was discovered during internal testing and affects mongodb-client-encryption module version 1.2.0, which was available from 2021-Jan-29 and deprecated in the NPM Registry on 2021-Feb-04. This vulnerability does not impact driver traffic payloads with CSFLE-supported key services from applications residing inside the AWS, GCP, and Azure nework fabrics due to compensating controls in these environments. This issue does not impact driver workloads that don’t use Field Level Encryption. This issue affect MongoDB Node.js Driver mongodb-client-encryption module version 1.2.0
    Severity
    6.4 (Medium)
    CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
    CWE
    • CWE-295 - Improper Certificate Validation
    Assigner
    References
    URL Tags
    https://jira.mongodb.org/browse/NODE-3125 x_refsource_MISC
    Impacted products
    Date Public
    2021-02-25 00:00
    Show details on NVD website
    To clipboard 

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