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MongoDB Ops Manager CVE-2026-87108

| EUVDEUVD-2026-95491 LOW
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-10-09 cna@mongodb.com GHSA-w8qp-gqxj-mpmx
2.3
CVSS 4.0 · Vendor: mongodb
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate as read-only project user
  2. Exploit
    Request host monitoring record ID from another project
  3. Impact
    Retrieve exposed deployment and host metadata

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Object-level authorization, IDOR prevention
Exploitation Conditions

Exploitation requires an authenticated Ops Manager account that holds at least a read-only role on some project (PR:L), AND possession of the exact identifier of a target daily host monitoring record belonging to a different project (the AT:P attack requirement). The attacker cannot discover records they have no identifier for through this flaw alone, which is the primary limiting factor; impact is confined to disclosure of host and configuration metadata (VC:L) with no write or availability effect. Exploitable over the network with no user interaction once those two prerequisites are met.

Impact

This is a genuinely low-priority issue, and the signals are consistent in saying so. The vendor (MongoDB) CVSS 4.0 vector scores it 2.3 - AV:N but with PR:L (requires an authenticated account), AT:P (a specific attack requirement, namely possession of a valid record identifier from another project), and only VC:L with no integrity or availability impact. This is a textbook IDOR/broken-object-level-authorization flaw (CWE-639), not a high-impact breach. No EPSS score, KEV listing, or public POC was provided, so there is no evidence of exploitation interest: exploitation status is 'no public exploit identified at time of analysis.' The one notable data-quality concern is that the input Tag 'Authentication Bypass' conflicts with both the description (the attacker is already authenticated) and CWE-639 (authorization bypass) - this should be read as an authorization/object-reference flaw, not an authentication bypass. No CVSS 3.1 vector was supplied, only the 4.0 vector; the PR:L in that vector is the basis for the 'authenticated' qualifier used below. Net: real but very low risk, gated by existing access and knowledge of a specific identifier.

Exploit ScenarioDerived

An authenticated Ops Manager user who holds only a read-only role on one project, but who has obtained (or guessed/enumerated) the identifier of a daily host monitoring record belonging to a different project, requests that record directly. Because ownership is not validated against the caller's project membership, the server returns the cross-project record, leaking host and deployment configuration metadata. No public exploit code is known at time of analysis.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 09, 2026

Read-only authenticated users of MongoDB Ops Manager can retrieve daily host monitoring records belonging to projects they do not have access to, exposing deployment metadata such as host and configuration details, when they already know the exact identifier of the target record. Exploitation requires a valid Ops Manager account with at least a read-only role on some project plus knowledge of a record identifier from a different project, which sharply limits practical exposure; impact is confined to low-severity information disclosure with no write or availability effect. There is no public exploit identified at time of analysis and the issue is not confirmed actively exploited (CISA KEV), consistent with the vendor-assigned CVSS 4.0 score of 2.3 and our independent CVSS 3.1 assessment of AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.

RemediationAI

Patch available per vendor advisory: the provided reference points to the MongoDB Ops Manager release notes for Ops Manager Server 8.0.27 (https://www.mongodb.com/docs/ops-manager/current/release-notes/application/#ops-manager-server-8027), so upgrading Ops Manager Server to that release - or to the latest available release in the supported train - is the primary fix, and the exact patched version should be confirmed against that release-notes page before scheduling the upgrade. Because exploitation requires an already-authenticated account and prior possession of a valid cross-project record identifier, the practical risk between disclosure and patch is small, but compensating controls are still worthwhile: restrict Ops Manager API and UI access to trusted management networks so that only known operators can reach the record endpoints, apply strict least-privilege to read-only project roles and review who currently holds them (trade-off: reduces the pool of accounts that could exercise the flaw but does not eliminate it for legitimate read-only users), and monitor Ops Manager access logs for read-only principals requesting monitoring-record endpoints whose identifiers fall outside the projects they are a member of (trade-off: requires log ingestion and baseline tuning, and cannot block the request in real time). Treating host monitoring record identifiers as sensitive values - avoiding their inclusion in tickets, exports, chat transcripts, or logs accessible to lower-privileged users - removes the AT:P prerequisite that the attacker must already know the key, though this is an operational hygiene measure rather than an enforceable control. There is no indication that disabling host monitoring is a reasonable workaround, since doing so would remove core Ops Manager functionality disproportionate to a low-severity metadata disclosure.

Affected VersionsENISA

Ops Manager 8.0.0 <8.0.27
Ops Manager 7.0.0 ≤7.0.23

Affected Packages

euvd ops_manager fix: 8.0.27

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

MongoDB Ops Manager is MongoDB's self-managed platform for automated deployment, monitoring, backup, and configuration management of MongoDB clusters; its daily host monitoring records contain deployment metadata including host identity and configuration details. The flaw is classified as CWE-639 (Authorization Bypass Through User-Controlled Key), the classic insecure direct object reference pattern: the API path that serves a daily host monitoring record uses a caller-supplied record identifier as the database lookup key without verifying that the record's owning project matches a project the caller is entitled to read. Because the ownership check is missing rather than the authentication check, a fully authenticated user with a legitimate read-only role on any project can pull a record that belongs to another project simply by presenting that record's identifier. The key mitigating factor is that the identifier is not discoverable through this endpoint itself (no enumeration or listing is exposed by the flaw), so the attacker must obtain the key from another source, which the CVSS 4.0 vector captures through AT:P, and the vendor-supplied tag of "Authentication Bypass" is a loose characterization - authentication is still required, and the actual defect is an authorization/ownership validation gap. No CPE strings were supplied with the advisory data, so the precise affected version matrix is not enumerated here.

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Severity by source

Vendor (mongodb) PRIMARY 2.3 LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
vuln.today AI 3.1 LOW

Authenticated low-priv user so PR:L; needing a valid cross-project record identifier maps the 4.0 AT:P requirement to AC:H; only metadata disclosure, so C:L and I/A:N.

3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (mongodb).

CVSS VectorVendor: mongodb

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
Low
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

1
Patch available
Oct 09, 2026 - 07:15 EUVD

DescriptionCVE.org

An authenticated Ops Manager user with a read-only project role can retrieve a daily host monitoring record associated with a different project when they possess the required record identifier. Insufficient ownership validation can expose deployment metadata, including host and configuration details.

Threat Intelligence Overview

EPSS Score
0.1%
Top 97% exploitable
Prevalence
Medium
enterprise MongoDB management product, common but not universally deployed
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity LOW
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Low
Technical Impact
Partial

Priority Score

12
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +12
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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