EUVD-2026-75640
GHSA-j7j2-rrxf-5xvf
Severity by source
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/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 via application endpoint, low privileges required per description, no scope change, high confidentiality impact from unauthorized record disclosure, no integrity or availability impact.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
Lifecycle Timeline
3DescriptionCVE.org
Improper neutralization of regular-expression metacharacters in the LINQ query translation component of the MongoDB C
Driver can cause a caller-supplied character sequence to alter a regular-expression predicate generated by an affected application. An authenticated user who can influence such a value may cause the application to return records beyond those intended by the original filter.
Articles & Coverage 2
AnalysisAI
Regex metacharacter injection in the MongoDB C# Driver's LINQ query translation layer allows an authenticated low-privilege user to alter generated regular-expression predicates, causing the application to return database records beyond those the original filter was designed to expose. The vulnerability, reported by MongoDB and tracked under CSHARP-6177 (CWE-943), requires only network access and a low-privilege account - making it a meaningful access-control risk in any .NET application that incorporates user input into LINQ regex-based queries against MongoDB. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated session with at least low privilege (PR:L) in the target application. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 7.1 with vector AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N is an accurate reflection of the risk profile: network-reachable, low complexity, no special attack requirements, requiring only a low-privilege authenticated session, with high confidentiality impact but no integrity or availability component. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade the MongoDB C# Driver to the version identified in MongoDB Jira CSHARP-6177 (https://jira.mongodb.org/browse/CSHARP-6177) as resolving this issue; the precise fixed release must be confirmed directly from the ticket, as no patched version number is encoded in currently available NVD or CPE data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all .NET applications using MongoDB C# Driver and identify which ones accept user-supplied input in LINQ regex query construction-prioritize applications handling sensitive data. …
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