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CVE-2026-33442: kysely vulnerability
CVE-2026-33442: high vulnerability affecting kysely. Check CVSS, KEV status, business impact and recommended administrator actions.
- CVSS
- 8.1 HIGH
- EPSS
- 36.15%
- Known exploited
- not in KEV
- Product
- kysely
What is known
Kysely is a type-safe TypeScript SQL query builder. In versions 0.28.12 and 0.28.13, the `sanitizeStringLiteral` method in Kysely's query compiler escapes single quotes (`'` → `''`) but does not escape backslashes. On MySQL with the default `BACKSLASH_ESCAPES` SQL mode, an attacker can inject a backslash before a single quote to neutralize the escaping, breaking out of the JSON path string literal and injecting arbitrary SQL. Version 0.28.14 fixes the issue.
Business impact
Successful exploitation of CVE-2026-33442, a high vulnerability (CVSS 8.1) affecting kysely, may affect the confidentiality, integrity or availability of the vulnerable environment. The exact impact depends on the installed version, exposed interfaces and deployment configuration.
Recommended administrator action
Confirm whether kysely is present and compare installed versions with the vendor advisory and NVD record. Apply the vendor patch or documented mitigation; until remediation is complete, reduce exposure of affected interfaces, review relevant logs and monitor for indicators of exploitation. DataHouse can support version verification, managed patching, network exposure reduction, log review and backup validation for dedicated, cloud and colocated environments.