p PatchFirst

CVE-2026-81524

CVE-2026-81524 · Cross-tenant database retargeting via dot/NUL injection in namespace strings in the C Driver

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

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.

CVSS 5.3 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • c driver

    Versions
    • ≥ 1.0.0, < 2.5.1: Affected (semver)

    Update to 2.5.1

  • mongo-c-driver Debian:12

    Versions
    • 1.23.1-1
    • 1.23.1-1+deb12u1
    • 1.23.1-1+deb12u2
    • 1.23.1-1+deb12u3
    • 1.24.1-1
    • 1.24.2-1
    • 1.24.3-1
    • 1.24.4-1
    • 1.25.0-1
    • 1.25.1-1
    • 1.25.2-1
    • 1.25.4-1
    • 1.25.4-1.1~exp1
    • 1.26.0-1
    • 1.26.0-1.1
    • 1.26.0-1.1~exp1
    • 1.26.1-1
    • 1.26.2-1
    • 1.27.0-1
    • 1.27.1-1
    • 1.27.2-1
    • 1.27.3-1
    • 1.27.4-1
    • 1.27.5-1
    • 1.27.6-1
    • 1.28.0-1
    • 1.28.1-1
    • 1.29.0-1
    • 1.29.1-1
    • 1.29.2-1
    • 1.30.0-1
    • 1.30.1-1
    • 1.30.2-1
    • 1.30.3-1
    • 1.30.4-1
    • 2.0.2-1
    • 2.1.0-1
    • 2.1.1-1
    • 2.1.2-1
    • 2.2.0-1
    • 2.2.1-1
    • 2.2.2-1
    • 2.2.3-1
    • 2.2.4-1
    • 2.3.0-1
    • 2.3.1-1
    • 2.3.2-1
    • 2.3.3-1
    • 2.4.0-1
    • 2.5.0-1
    • 2.5.1-1
    • 2.5.2-1
    • 2.5.3-1
    • 2.5.5-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mongo-c-driver Debian:13

    Versions
    • 1.30.4-1
    • 1.30.4-1+deb13u1
    • 1.30.4-1+deb13u2
    Affected ranges
    • ECOSYSTEM: < 1.30.4-1+deb13u3

    Update to 1.30.4-1+deb13u3

  • mongo-c-driver Debian:14

    Versions
    • 1.30.4-1
    • 2.0.2-1
    • 2.1.0-1
    • 2.1.1-1
    • 2.1.2-1
    • 2.2.0-1
    • 2.2.1-1
    • 2.2.2-1
    • 2.2.3-1
    • 2.2.4-1
    • 2.3.0-1
    • 2.3.1-1
    • 2.3.2-1
    • 2.3.3-1
    • 2.4.0-1
    • 2.5.0-1
    Affected ranges
    • ECOSYSTEM: < 2.5.1-1

    Update to 2.5.1-1

  • mongo-c-driver Ubuntu:Pro:20.04:LTS

    Versions
    • 1.15.0-1
    • 1.15.1-1
    • 1.15.2-1
    • 1.16.0-1
    • 1.16.1-1
    • 1.16.1-1build1
    • 1.16.1-1build2
    • 1.16.1-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mongo-c-driver Ubuntu:Pro:22.04:LTS

    Versions
    • 1.18.0-1
    • 1.19.1-1
    • 1.19.2-1
    • 1.20.0-1
    • 1.20.0-1build1
    • 1.20.1-1
    • 1.21.0-1
    • 1.21.0-1build1
    • 1.21.0-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mongo-c-driver Ubuntu:Pro:24.04:LTS

    Versions
    • 1.24.3-1
    • 1.24.4-1
    • 1.25.1-1
    • 1.25.2-1
    • 1.25.4-1
    • 1.26.0-1
    • 1.26.0-1.1ubuntu1
    • 1.26.0-1.1ubuntu2
    • 1.26.0-1.1ubuntu2+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mongo-c-driver Ubuntu:26.10

    Versions
    • 2.2.2-1
    • 2.3.1-1
    • 2.3.2-1
    • 2.3.3-1build1
    • 2.5.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mongo-c-driver Ubuntu:26.04:LTS

    Versions
    • 1.30.4-1ubuntu1
    • 2.2.0-1
    • 2.2.1-1
    • 2.2.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

Check your server →