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CVE-2026-120805 Authorization bypass via redirected FLE2 state-collection writes in encrypted CRUD path

2.3 lowEPSS 0.2%

Low (2.3) in mongodb mongodb server. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.

On this page
In MongoDB Server, an authenticated user with insert privileges on a collection could craft a command with specially constructed encryption-related parameters to redirect internal Queryable Encryption metadata writes to metadata belonging to other encrypted collections within the same database. The server’s authorization layer validated only the user-facing target collection namespace, while subsequent internal writes derived from client-supplied parameters were performed with elevated internal privileges, bypassing the original caller’s permission scope. This could allow unauthorized writes into another collection’s Queryable Encryption metadata, potentially corrupting encrypted index state and compaction operations.

Severity

CVSS 4.0

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

CVSS 3.1

4.3 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS
0.2% estimated probability of exploitation activity in the next 30 days; 5th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: none · Automatable: no · Technical impact: partial, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-862 Missing Authorization
OWASP Top 10
A01:2025 Broken Access Control
Published
Modified
Assigned by
mongodb (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

  • mongodb:mongodb server

Versions

From the CNA's record in the CVE List.

ProductAffected
MongoDB Serverfrom 9.0.0 before 9.0.7
MongoDB Serverfrom 8.3.0 before 8.3.16
MongoDB Serverfrom 8.0.0 before 8.0.37
MongoDB Serverfrom 7.0.0 before 7.0.48

Attack patterns (CAPEC)

  • CAPEC-665 Exploitation of Thunderbolt Protection Flaws Likelihood: Low · Severity: Very High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

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