CVE-2026-18709
Low
No strong exploitation signal.
CVSS base
6.4
MEDIUM
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS — probability of exploitation (30 days)
0.1%
3.1th percentile
CISA KEV
Not listed
Weakness / dates
CWE-862
Published 2026-08-11 · modified 2026-09-16
CVSS breakdown
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
| Attack Vector | A | Adjacent |
| Attack Complexity | H | High |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2026-08-11 — Published (NVD)
- 2026-09-16 — Last modified (NVD)
Description
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.