Retrospective for 2026-06-11, compiled on 27 October 2026. The date identifies the day being analysed; source publication and revision dates are recorded below.
What this advisory changes in your environment
The starting point is CERTFR-2026-AVI-0735, published on 2026-06-11. Its scope includes Core Server. Reported consequences are denial of service, loss of confidentiality. These statements apply to the advisory’s scope; they do not assign every consequence to every product or CVE.
This case focuses on Core Server. Locate that edition in live installations, deployment images and actual dependencies, rather than treating every product from MongoDB as equivalent.
Products and versions to examine
- Reference
- CERTFR-2026-AVI-0735
- Source first published
- 2026-06-11
- Latest source revision available for this day
- 2026-06-11
- Named components
- Core Server
- CVE identifiers
- CVE-2026-9749, CVE-2026-9754, CVE-2026-9752, CVE-2026-9741, CVE-2026-9742, CVE-2026-9743, CVE-2026-9735, CVE-2026-9750, CVE-2026-9753, CVE-2026-9740, CVE-2026-9751, CVE-2026-9748, CVE-2026-9746, CVE-2026-9747
| Component | Published condition |
|---|---|
| Core Server | 8.3.x : < 8.3.3 |
| Core Server | < 7.0.35 |
| Core Server | 8.2.x : < 8.2.10 |
| Core Server | 8.0.x : < 8.0.24 |
For Core Server, the published condition is “8.3.x : < 8.3.3”. Compare the version actually loaded with that condition within its own release branch. A fix installed on another edition of Core Server does not close this case.
Mechanism and prerequisites
A confidentiality failure may expose information without changing it. Identify accessible datasets, keys and stored tokens, then investigate unusual access before deciding which credentials require rotation.
The primary record CVE-2026-9749, published by mongodb, covers MongoDB Server. The retained revision is dated 2026-06-10. Its scope is presented separately from the integrations and product groupings in CERTFR-2026-AVI-0735.
The published metric for CVE-2026-9749 is CVSS 4.0, 7.1/10. The vector below describes technical prerequisites; it does not measure attack frequency or the likelihood that your deployment is compromised.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Attack vector
- network
- Prior privileges
- low
- User interaction
- none
- Complexity
- low
- Additional attack requirements
- none
- Weakness
- CWE-617
Choose the appropriate intervention
- Locate Core Server instances, running releases and service owners. Record condition 8.3.x : < 8.3.3 in the ticket alongside reference CERTFR-2026-AVI-0735.
- Compare the installed branch with the vendor’s Core Server release notes. Prepare the package for that branch and a dependent-service test, retaining the pre-change state.
- After changing Core Server, capture the loaded version again and verify the workflow below. Any exception needs an owner, an exposure-reduction measure and an expiry date.
Verify the fix in a real workflow
Validation scenario to adapt for Core Server: With Core Server, run a reference read and transaction in a test database through the application’s actual client. Check account permissions, errors and any replication; distinguish the server release from the driver release. This is a proposed defensive check, not a claim that testing was performed against third-party systems.
Limit of case CERTFR-2026-AVI-0735: this analysis replaces neither vendor prerequisites nor investigation of your logs. Only documented versions are reproduced; no attack date or victim is invented.
Questions specific to this case
Which condition should be checked for Core Server?
Advisory CERTFR-2026-AVI-0735 states: Core Server — 8.3.x : < 8.3.3. Check the edition and running release; do not extend the published boundary to branches absent from the advisory.
Which prerequisites does record CVE-2026-9749 specify?
For CVE-2026-9749, the published vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N. Verify those conditions on MongoDB Server before applying them to an integration named in CERTFR-2026-AVI-0735.
Sources and related reading
- CERT-FR · CERTFR-2026-AVI-0735
- Vendor and remediation · jira.mongodb.org
- Vendor and remediation · jira.mongodb.org
- Vendor and remediation · jira.mongodb.org
- Vendor and remediation · jira.mongodb.org
- CVE-2026-9749 · CNA
Practical guide : Data reliability: diagnose a dashboard before making a decision
Explore the decision addressed in this case
- Core Server: establish the remediation scope
- Oracle Database Server (Net Service): contain code execution
Complete source advisory inventory
The article table may be an extract. These lists contain every affected-system entry and CVE in the specified advisory revision. They are not an inventory of your assets and do not map every CVE to every product.
Official source · CERTFR-2026-AVI-0735
Advisory revision : · Checked on :
Affected systems · 4
Original French wording is retained to avoid ambiguous translations of version conditions.
- Core Server versions 8.3.x antérieures à 8.3.3
- Core Server versions antérieures à 7.0.35
- Core Server versions 8.2.x antérieures à 8.2.10
- Core Server versions 8.0.x antérieures à 8.0.24