Security Resilience

CVE-2026-88026

Mongodb C\# Driver 2.14.0 – 3.11.2

Published
10 September 2026
Modified
29 September 2026
Patch / advisory
View advisory
CVSS Score v4 7.1
Click a component to see what it means
Raw vectorCVSS: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
EPSS Score 0.0038 30th percentile
Risk Priority 36 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-88026 is a high-severity Improper Neutralization of Special Elements in Data Query Logic (CWE-943) vulnerability in Mongodb C\# Driver. Its CVSS base score is 7.1 (High).

Operationally, ranked at the 30th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

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…

more

value may cause the application to return records beyond those intended by the original filter.

CWE(s)
CWE-943

Related Threats

CVEs Like This One

CVE-2026-88025Same product: Mongodb C\# Driver
CVE-2026-81529Same product: Mongodb C\# Driver
CVE-2026-93760Same vendor: Mongodb
CVE-2026-88029Same vendor: Mongodb
CVE-2026-88031Same vendor: Mongodb
CVE-2026-88036Same vendor: Mongodb
CVE-2026-88030Same vendor: Mongodb
CVE-2026-88034Same vendor: Mongodb
CVE-2026-88033Same vendor: Mongodb
CVE-2026-88028Same vendor: Mongodb

Affected Assets

mongodb
c\# driver
2.14.0 — 3.11.2

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation partial match

Input validation directly stops unneutralized special elements from reaching query logic.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development catches injection vulnerabilities before release but does not itself implement the fix.

A.8.28 Secure coding partial match
prevents

Secure coding standards require proper neutralization of special elements in all data queries.

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-943, a class-level weakness, and none of its children carries one either.

References