Cross-Shard Failovers May Lead to Partial Transaction Commit in MongoDB Server

published 2025-12-09 11 mo ago modified 2026-10-07 32 d ago also BIT-mongodb-2025-14345 , EUVD-2025-201945

cvss: 4.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits: 0; none known

A post-authentication flaw in the network two-phase commit protocol used for cross-shard transactions in MongoDB Server may lead to logical data inconsistencies under specific conditions which are not predictable and exist for a very short period of time. This error can cause the transaction coordination logic to misinterpret the transaction as committed, resulting in inconsistent state on those shards. This may lead to low integrity and availability impact.

This issue impacts MongoDB Server v8.0 versions prior to 8.0.16, MongoDB Server v7.0 versions prior to 7.0.26 and MongoDB server v8.2 versions prior to 8.2.2.

Patch / fix

fixed in 2

bitnami mongodb 7.0.26, 8.0.16, 8.2.2, 8.3.1
MongoDB Inc. MongoDB Server 7.0.26, 8.0.16, 8.2.2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 11 mo ago (2025-12-09)

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.2	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CNA	4.0	2.3	CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CNA	4.0	2.3	CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/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
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
OSV	3.1	4.2	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
bitnami	mongodb	>=7.0.0, <7.0.26 >=8.0.0, <8.0.16 >=8.2.0, <8.2.2 >=8.3.0, <8.3.1	7.0.26 8.0.16 8.2.2 8.3.1

Affected products

MongoDB Inc. MongoDB Server

Classification

Weakness

CWE-667 Improper Locking

Technology feeds

MongoDB rss critical rss

References

jira.mongodb.org /browse/SERVER-106075
vendor-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2025-14345
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary