CVE-2026-18698 json
Improper Authorization in MongoDB Server Allows Unauthorized Actions on System Collections via the validate Command
published 2026-08-11 2 mo ago modified 2026-10-23 16 d ago also BIT-mongodb-2026-18698 , EUVD-2026-56882
- cvss
- 5.4
- 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 15%
- public exploits
- 0
- none known
Summary
An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that should require more specific privileges. This could result in exposure of collection metadata and, on certain deployment configurations, unauthorized modification of system collection data.
Patch / fix
- bitnami mongodb 7.0.40, 8.0.29, 8.3.8, 9.0.2
- MongoDB MongoDB Server 7.0.40, 8.0.29, 8.3.8
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mongodb | >=7.0.0, <7.0.40 >=8.0.0, <8.0.29 >=8.2.0, <8.3.8 >=9.0.0, <9.0.2 |
7.0.40 8.0.29 8.3.8 9.0.2 |
Affected products
- MongoDB MongoDB Server
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
- Technology feeds
References
-
jira.mongodb.org
/browse/SERVER-130481
vendor-advisory, issue-tracking, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-18698
web
Sources
- CVE List CVE-2026-18698
- NVD CVE-2026-18698
- OSV BIT-mongodb-2026-18698
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