{"id":"CVE-2026-88026","title":"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…","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","cwe":["CWE-943"],"vendor":"mongodb","product":"c#_driver","affected":["c#_driver >= 2.14.0, < 3.11.2"],"patched":["c#_driver 3.11.2"],"published":"2026-09-10","updated":"2026-09-29","sourceUpdated":"2026-09-29T16:17:10.160","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88026","references":[{"url":"https://jira.mongodb.org/browse/CSHARP-6177","label":"cna@mongodb.com"}],"tags":["nvd","cve.org"],"epss":0.00379,"epssPercentile":0.31756,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-10T18:23:15.544067Z"},"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, < 3.11.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `c#_driver 3.11.2`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}