CVE-2026-33442 — Kysely has a MySQL SQL Injection via Backslash Escape Bypass in non-type-safe usage of JSON path keys.

CVE-2026-33442

Kysely has a MySQL SQL Injection via Backslash Escape Bypass in non-type-safe usage of JSON path keys. PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
kysely-org / kysely	affected >= 0.28.12, < 0.28.14

CWE

CWE-89

References

https://github.com/kysely-org/kysely/security/advisories/GHSA-fr9j-6mvq-frcv

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.