EUVD-2026-56906
GHSA-cpxv-jhq7-7xvw
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/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
Network-reachable by any authenticated read account (PR:L, AV:N, AC:L); integrity is fully compromised via unauthorized writes; no confidentiality or availability impact applies.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/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
Lifecycle Timeline
3DescriptionCVE.org
An issue in MongoDB Server's aggregation framework could allow an authenticated user with only read privileges to perform write operations against collections they should not be able to modify. This is due to an internal-use aggregation stage being reachable by external clients without an appropriate authorization check on its embedded operations.
AnalysisAI
Privilege escalation in MongoDB Server's aggregation framework allows any authenticated read-only user to perform unauthorized write operations against collections they lack write access to. The root cause is an internal-use aggregation stage reachable by external clients without an authorization check on its embedded operations (CWE-862: Missing Authorization). …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid MongoDB account holding at minimum read-level privileges on the target instance (PR:L per CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N) characterizes this as a low-complexity, network-reachable flaw requiring only a low-privilege authenticated session - the lowest realistic credential tier in a MongoDB deployment. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained a low-privilege read-only MongoDB account - through credential stuffing, a compromised application service account, or deliberate provisioning - connects to the MongoDB Server over the network and submits a crafted aggregation pipeline that references the internal write-capable stage. The server processes the pipeline and executes the embedded write operation without verifying the caller's write authorization, allowing the attacker to insert, modify, or delete documents in a restricted collection. … |
| Remediation | Monitor the MongoDB JIRA ticket SERVER-129936 (https://jira.mongodb.org/browse/SERVER-129936) for patch release announcements, as no specific fixed version was confirmed in the available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and audit all MongoDB Server deployments, catalog read-only user accounts, and enable query logging focused on aggregation pipeline operations. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Mongodb Server
View allCredential exposure in MongoDB Server's replica-set/sharded-cluster internal authentication allows an adjacent-network a
Out-of-bounds memory write in MongoDB Server's time-series collection feature enables arbitrary code execution by authen
MongoDB Server sharded clusters are vulnerable to use-after-free memory corruption when authenticated users with read pe
Remote unauthenticated denial-of-service in MongoDB Server's BSON validation layer allows attackers to crash the mongod
Unauthenticated denial of service in MongoDB Server's aggregation framework allows remote attackers to crash the mongos
Pre-authentication denial-of-service in MongoDB Server allows unauthenticated remote clients to crash the database proce
Authenticated users can crash MongoDB Server by chaining specific server-side JavaScript operations ($_internalJsEmit or
Use-after-free in MongoDB Server's timeseries bucket lifecycle handling allows an authenticated user with write-level pr
Use-after-free memory corruption in MongoDB Server's $graphLookup aggregation stage allows an authenticated high-privile
Memory disclosure and denial-of-service in MongoDB Server allows any authenticated user with aggregate command privilege
Queryable Encryption maintenance operations in MongoDB Server permit an authenticated low-privileged database user to ca
Authorization bypass in MongoDB Server allows an authenticated user holding only a limited database-scoped role to issue
Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today