kysely-org kysely up to 0.28.16 path traversal

Summaryinfo

A vulnerability marked as critical has been reported in kysely-org kysely up to 0.28.16. Impacted is an unknown function. The manipulation leads to path traversal. This vulnerability is listed as CVE-2026-44635. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in kysely-org kysely up to 0.28.16 and classified as critical. This issue affects an unknown code. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is:

Kysely is a type-safe TypeScript SQL query builder. From 0.26.0 to 0.28.16, DefaultQueryCompiler.visitJSONPathLeg does not escape JSON-path metacharacters (., [, ], *, **, ?). When attacker-controlled input flows into eb.ref(col, '->$').key(input) or .at(input) — including type-safe code where the JSON column is shaped like Record so K extends string is the inferred type — every dot becomes a path-leg separator, letting an attacker traverse from the intended key into sibling and child fields the developer never meant to expose. The result is read access (and, in update statements, write access) to JSON sub-fields outside the intended scope across MySQL, PostgreSQL ->$/->>$, and SQLite. This vulnerability is fixed in 0.28.17.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-44635 since 05/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 0.28.17 eliminates this vulnerability.

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Productinfo

Vendor

• kysely-org

Name

• kysely

Version

• 0.28.0
• 0.28.1
• 0.28.2
• 0.28.3
• 0.28.4
• 0.28.5
• 0.28.6
• 0.28.7
• 0.28.8
• 0.28.9
• 0.28.10
• 0.28.11
• 0.28.12
• 0.28.13
• 0.28.14
• 0.28.15
• 0.28.16

Website

• Product: https://github.com/kysely-org/kysely/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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