CVE-2026-8201 json
Use-After-Free in MongoDB FLE Query Analysis When Processing Positional Projections on Encrypted Fields
published 5mo ago modified 16d ago also BIT-mongodb-2026-8201 , EUVD-2026-29892
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 2%
- public exploits
- 0
- none known
Summary
A use-after-free vulnerability exists in MongoDB's Field-Level Encryption (FLE) query analysis component, affecting client-side uses of mongocryptd and crypt_shared. Triggering this vulnerability requires control over the structure of a client's FLE-related query.
This issue impacts MongoDB Server’s mongocryptd component v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
Patch / fix
- bitnami mongodb 7.0.34, 8.0.23, 8.2.9, 8.3.2
- MongoDB, Inc. MongoDB Server 7.0.34, 8.0.23, 8.2.9, 8.3.2
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5mo ago
Exploit prediction
0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.1 | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:L/SI:N/SA:N |
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H |
| CNA | 4.0 | 6.1 | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:L/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 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mongodb | >=7.0.0, <7.0.34 >=8.0.0, <8.0.23 >=8.2.0, <8.2.9 >=8.3.0, <8.3.2 |
7.0.34 8.0.23 8.2.9 8.3.2 |
Affected products
- MongoDB, Inc. MongoDB Server
Classification
- Weakness
-
- CWE-416 Use After Free
- Technology feeds
References
-
jira.mongodb.org
/browse/SERVER-122032
issue-tracking, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-8201
web
Sources
- CVE List CVE-2026-8201
- NVD CVE-2026-8201
- OSV BIT-mongodb-2026-8201
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