CVE-2026-33442

HIGH

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

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 8.1
EPSS 0.0003
EPSS Percentile 9.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-89
Status published
Products (3)
kysely/kysely 0.28.12 - 0.28.14
kysely-org/kysely >= 0.28.12, < 0.28.14
npm/kysely 0.28.12 - 0.28.14npm
Published Mar 26, 2026
Tracked Since Mar 26, 2026