This report was translated by AI; nobody has reviewed the translation yet. Original language: Slovak.

[TLP:CLEAR] MongoDB Server fixes 3 vulnerabilities

MongoDB fixes 3 vulnerabilities in MongoDB Server with versions 7.0.31, 8.0.20 and 8.2.6.

MongoDB Server - use-after-free (CVE-2026-4148)
CVSS 8.7 (High)

An authenticated remote attacker can trigger a memory management error using specially crafted database queries, which may lead to code execution or a DoS attack [1][2].

The vulnerability is present in product:

  • MongoDB Server; >=7.0, <7.0.31; >=8.0, <8.0.20; >=8.2, <8.2.6;

CVSS: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

More information:

The vulnerability was publicly disclosed 17. 3. 2026.

MongoDB Server - stack memory disclosure (CVE-2026-4147)
CVSS 7.1 (High)

An authenticated remote attacker can gain access to uninitialized data in memory using specially crafted requests [3][4].

The vulnerability is present in product:

  • MongoDB Server; >=7.0, <7.0.31; >=8.0, <8.0.20; >=8.2, <8.2.6;

CVSS: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

More information:

The vulnerability was publicly disclosed 17. 3. 2026.

MongoDB Server - double-free (CVE-2026-4358)
CVSS 6.1 (Medium)

An authenticated remote attacker can trigger a memory management error using specially crafted database queries, which may lead to a DoS or partial information disclosure [5][6].

The vulnerability is present in product:

  • MongoDB Server; >=7.0, <7.0.31; >=8.0, <8.0.20; >=8.2, <8.2.6;

CVSS: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

More information:

The vulnerability was publicly disclosed 17. 3. 2026.

By CESNET, z.s.p.o. Henrieta Paločková on 20. 3. 2026.

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