{"id":"CVE-2026-88026","title":"Regular expression injection via unescaped characters in LINQ query translation in MongoDB C# Driver","summary":"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…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-943"],"vendor":"MongoDB","product":"C# Driver","affected":["c_driver >= 2.14.0 <= 3.11.1"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-10T18:23:15.544067Z"},"published":"2026-09-10","updated":"2026-09-10","sourceUpdated":"2026-09-10T18:24:21.520Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-88026","references":[{"url":"https://jira.mongodb.org/browse/CSHARP-6177"}],"tags":["cve.org"],"epss":0.00219,"epssPercentile":0.12599,"ingestedAt":"2026-09-11T16:45:48.027Z","slug":"CVE-2026-88026","body":"## Overview\n\nImproper 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.\n\n## Affected\n\n- `c_driver >= 2.14.0 <= 3.11.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}