Analyst readout for executives and security teams
Plain-English summary
CVE-2026-9754 is a MongoDB information disclosure issue. A user who already has authenticated read access may trigger the filemd5 command in a crafted way and receive limited uninitialized stack memory. The main business risk is leakage of sensitive in-process data from affected MongoDB 8.2.0 or 8.3.0 deployments.
Executive priority
Treat this as a high-priority confidentiality issue for affected MongoDB versions. It is not described as unauthenticated or destructive, but it can expose memory to low-privilege users. Prioritize version inventory, credential review, and vendor-directed remediation.
Technical view
The CVE describes CWE-457 use of uninitialized stack memory in MongoDB filemd5 handling. CVSS 4.0 is 7.1 high: network reachable, low attack complexity, low privileges, no user interaction, high vulnerable-system confidentiality impact, and no integrity or availability impact.
Likely exposure
Exposure appears limited to MongoDB 8.2.0 and 8.3.0 where authenticated users with the read role can reach filemd5. The source bundle marks default status as unaffected for other versions, but does not provide CPEs or deployment-specific constraints.
Exploitation context
The provided sources do not show CISA KEV listing, active exploitation, or public exploit availability. Exploitation requires an authenticated account with read role, so insider misuse, compromised low-privilege database users, or over-broad application credentials are the main concern.
Researcher notes
Key evidence is limited to CVE metadata and MongoDB Jira reference. The CVSS vector indicates confidentiality-only impact on the vulnerable system. Do not assume affected versions beyond 8.2.0 and 8.3.0, and do not infer a patch version from the supplied sources.
Mitigation direction
- Inventory MongoDB deployments and identify any 8.2.0 or 8.3.0 instances.
- Review MongoDB SERVER-122207 and vendor guidance for fixed releases or workarounds.
- Reduce unnecessary read-role accounts and limit network paths to MongoDB.
- Audit application credentials for excessive database read access.
- Monitor for unusual filemd5 command usage by low-privilege users.
Validation and detection
- Confirm exact MongoDB versions running in production, staging, and backups.
- List accounts with read role on affected databases.
- Check audit or command logs for unexpected filemd5 usage.
- Verify vendor guidance before declaring a version remediated.
- Document whether filemd5 is required by legitimate workflows.
Public sources used
Based on public source material and reviewed before publication.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-457: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-9754 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N — — mongodb CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N 2.8 3.6 mongodb Vulnerability scoring details
Base CVSS 4.0 score
7.1 HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Base CVSS 3.1 score
6.5 MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reserved CVE Program
The CVE ID was reserved by the assigning CNA.
- CVE published CVE Program
The CVE record was published.
- CVE updated CVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 source CVE List V5
- https://jira.mongodb.org/browse/SERVER-122207 CVE reference, mongodb
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of Uninitialized Variable
Use of Uninitialized Variable represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.