SQL Injection in Kysely
CVE-2026-33468
Kysely is a type-safe TypeScript SQL query builder. Prior to version 0.28.14, Kysely's `DefaultQueryCompiler.sanitizeStringLiteral()` only escapes single quotes by doubling them (`'` → `''`) but does not escape backslashes. When used with the MySQL dialect (where `NO_BACKSLASH_ESCAPES` is OFF by default), an attacker can use a backslash to escape the trailing quote of a string literal, breaking out of the string context and injecting arbitrary SQL. This affects any code path that uses `ImmediateValueTransformer` to inline values — specifically `CreateIndexBuilder.where()` and `CreateViewBuilder.as()`. Version 0.28.14 contains a fix.
Vulnerability class: SQL Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Kysely
- Kysely-Org Kysely — versions < 0.28.14
Weakness classification (CWE)
References
- github.com/kysely-org/kysely/security/advisories/GHSA-8cpq-38p9-67gx (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33468?
- CVE-2026-33468 is a high-severity vulnerability in Kysely, classified under SQL Injection. CVSS score: 8.1/10. Published 2026-03-26.
- How severe is CVE-2026-33468?
- High severity. CVSS v3 base score is 8.1 out of 10.