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CVE-2026-106433

CVE-2026-106433 · Heap corruption via duplicate masterKey fields in MongoDB libmongocrypt

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Improper state management in MongoDB libmongocrypt can cause provider-specific data to be treated as an incompatible type when cleaning up a key document containing duplicate masterKey fields. An authenticated actor who can modify key vault documents, or a server that returns such a key document, can cause invalid memory access and invalid frees in the client process. This can terminate the application or corrupt process memory.

CVSS 8.7 · High · EPSS 0.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • libmongocrypt

    Versions
    • ≥ 1.1.0, < 1.20.5: Affected (semver)

    Update to 1.20.5

  • libmongocrypt Debian:12

    Versions
    • 1.10.0-1
    • 1.10.1-1
    • 1.11.0-1
    • 1.12.0-1
    • 1.13.0-1
    • 1.13.1-1
    • 1.13.2-1
    • 1.16.0-1
    • 1.17.0-1
    • 1.17.3-1
    • 1.18.1-1
    • 1.18.2-1
    • 1.19.0-1
    • 1.19.1-1
    • 1.20.0-1
    • 1.20.1-1
    • 1.20.2-1
    • 1.20.3-1
    • 1.20.4-1
    • 1.20.5-1
    • 1.7.2-1
    • 1.8.2-1
    • 1.8.4-1
    • 1.9.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmongocrypt Debian:13

    Versions
    • 1.13.2-1
    • 1.13.2-1+deb13u1
    • 1.16.0-1
    • 1.17.0-1
    • 1.17.3-1
    • 1.18.1-1
    • 1.18.2-1
    • 1.19.0-1
    • 1.19.1-1
    • 1.20.0-1
    • 1.20.1-1
    • 1.20.2-1
    • 1.20.3-1
    • 1.20.4-1
    • 1.20.5-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmongocrypt Debian:14

    Versions
    • 1.13.2-1
    • 1.16.0-1
    • 1.17.0-1
    • 1.17.3-1
    • 1.18.1-1
    • 1.18.2-1
    • 1.19.0-1
    • 1.19.1-1
    • 1.20.0-1
    • 1.20.1-1
    • 1.20.2-1
    • 1.20.3-1
    • 1.20.4-1
    Affected ranges
    • ECOSYSTEM: < 1.20.5-1

    Update to 1.20.5-1

  • libmongocrypt Ubuntu:22.04:LTS

    Versions
    • 1.2.1-1
    • 1.2.2-1
    • 1.3.0-1
    • 1.3.0-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmongocrypt Ubuntu:24.04:LTS

    Versions
    • 1.7.2-1
    • 1.8.2-1
    • 1.8.4-1
    • 1.8.4-1build2
    • 1.8.4-1build3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmongocrypt Ubuntu:26.10

    Versions
    • 1.17.0-1
    • 1.19.0-1
    • 1.19.1-1
    • 1.20.0-1
    • 1.20.1-1build1
    • 1.20.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libmongocrypt Ubuntu:26.04:LTS

    Versions
    • 1.13.2-1
    • 1.17.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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