CVE-2026-33442: Kysely is a type-safe TypeScript SQL query builder

Q: How do I fix CVE-2026-33442?

kysely: upgrade to 0.28.14. Exact commands for each OS are on this page.

Q: Is CVE-2026-33442 being exploited?

CVE-2026-33442 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33442 affect?

CVE-2026-33442 affects kysely. Severity is high (CVSS 8.1). 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

Q: How urgent is CVE-2026-33442?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.1REMOTEUPGRADE

CVE-2026-33442 is a high-severity flaw (CVSS 8.1) affecting kysely. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 fixe

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-89
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: kysely

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-26 17:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

kysely kysely UPGRADE

Affected: >= 0.28.12 and < 0.28.14

Fixed in: 0.28.14

Safe to downgrade to: a release before 0.28.12

1. Check installed version

npm ls kysely

2. UPGRADE to 0.28.14

npm install kysely@">=0.28.14"

3. If no update is available yet, DOWNGRADE to a release before 0.28.12

npm view kysely versions npm install kysely@"<0.28.12"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33442?

kysely: upgrade to 0.28.14. Exact commands for each OS are on this page.

Is CVE-2026-33442 being exploited?

CVE-2026-33442 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33442 affect?

CVE-2026-33442 affects kysely. Severity is high (CVSS 8.1). 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

How urgent is CVE-2026-33442?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

MySQL vulnerabilities

Related CVEs

CVE-2026-33468 HIGH 8.1 UPGRADE Kysely is a type-safe TypeScript SQL query builder
CVE-2026-32763 HIGH 8.2 UPGRADE Kysely is a type-safe TypeScript SQL query builder

References

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