CVE-2024-39677: NHibernate SQL injection vulnerability in discriminator mappings, static fields referenced in HQL, and some utilities

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-08 · updated 2026-06-17
Weakness: CWE-89

Description

NHibernate is an object-relational mapper for the .NET framework. A SQL injection vulnerability exists in some types implementing ILiteralType.ObjectToSQLString. Callers of these methods are exposed to the vulnerability, which includes mappings using inheritance with discriminator values; HQL queries referencing a static field of the application; users of the SqlInsertBuilder and SqlUpdateBuilder utilities, calling their AddColumn overload taking a literal value; and any direct use of the ObjectToSQLString methods for building SQL queries on the user side. This vulnerability is fixed in 5.4.9 and 5.5.2.

Affected products

nhibernate-core: before 5.4.9; from 5.5.0 before 5.5.2 — fixed in 5.4.9, 5.5.2

How to fix

Upgrade to a fixed version: nhibernate-core 5.4.9, 5.5.2. Check the vendor advisory for mitigations.

References

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