Name: CVE-2026-18709: Missing Authorization
Creator: Rapid7
Published: 2026-08-11T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-18709, CWE-862, CVSS 6.4, EPSS 0.00195

An issue in MongoDB Server could allow an authenticated user with direct network access to a shard to improperly commit or abort an in-progress prepared transaction, bypassing the intended transaction coordination process. This could result in cross-shard data inconsistency, cluster clock corruption, and violation of transaction atomicity guarantees.

CVSS Details

CVSS 4.0 Base Score: 5.9 (MEDIUM)
CVSS 4.0 Vector: (CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 6.4
CVSS 3.1 Vector: (CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Mongodb	—	Upgrade MongoDB to version 8.2.12Upgrade MongoDB to version 8.3.8Upgrade MongoDB to version 7.0.40Upgrade MongoDB to version 8.0.29Upgrade to the latest version of MongoDB	Sep 23, 2026	Aug 11, 2026

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CVSS Details

Covered by Rapid7

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