CVE-2026-75513
Marten is a .NET Transactional Document DB and Event Store on PostgreSQL.
Impact
Marten is a .NET Transactional Document DB and Event Store on PostgreSQL. From version 7.0.0 until 9.13.0, several Marten LINQ and tenant-management paths interpolate runtime, potentially attacker-controlled strings into single-quoted SQL literals without escaping or parameterization. The primary confirmed vector is a dictionary indexer key used by Where filters in src/Marten/Linq/Members/Dictionaries/DictionaryItemMember.cs. Additional affected sinks include SelectParser.cs, DatabaseScopedTenantPartitions.cs, and DeleteAllForTenant.cs reached through IEventStore.DeleteProjectionProgressAsync, while DictionaryContainsKeyFilter.cs (Newtonsoft serializer only; System.Text.Json is not affected) handles ContainsKey calls. Events/Daemon/Internals/EventLoader.cs contains a related per-tenant partition-pruning literal that the advisory identifies as a defense-in-depth sink. A crafted single quote can escape the generated literal, enabling filter or multi-tenant authorization bypass and blind data exfiltration, and deployments that permit semicolon-batched Npgsql statements may also allow data modification. This issue is fixed in version 9.13.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | Marten | >= 7.0.0, <= 9.12.0 | 9.13.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-rfx3-98h7-v3xp
- https://github.com/JasperFx/marten/security/advisories/GHSA-rfx3-98h7-v3xp
- https://nvd.nist.gov/vuln/detail/CVE-2026-75513
- https://github.com/JasperFx/marten/pull/4911
- https://github.com/JasperFx/marten/commit/61882d0424854cb48703f08bdb246894ac576bed
- https://github.com/JasperFx/marten/releases/tag/9.13.0