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Vulnerability record · CVE-2026-88026 · published 10 September 2026

CVE-2026-88026: Improper neutralization of regular-expression metacharacters in the LINQ query translation component of the Mo…

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.

7.1 CVSS 4.0 High EPSS 0.37% · top 71.5% CWE-943 · CWE-943 Undergoing Analysis
7.1CVSS 4.0 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
10 Sep 2026Last modified by NVD

Description

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.

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:

References

LinkTags
https://jira.mongodb.org/browse/CSHARP-6177

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Source: NIST National Vulnerability Database (record CVE-2026-88026), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.