Marten has an injection vulnerability in its full-text search regConfig parameter

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2026-45288: 0.38% estimated exploitation activity in the next 30 days; percentile 31.49 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary Marten's full-text search APIs interpolated the user-supplied regConfig parameter directly into the generated SQL without parameterization or validation, making every code path that exposes regConfig to untrusted input a SQL injection sink. Affected APIs - IQuerySession.SearchAsync<T(string searchTerm, string regConfig, ...) - IQuerySession.PlainTextSearchAsync<T(...) - IQuerySession.PhraseSearchAsync<T(...) - IQuerySession.WebStyleSearchAsync<T(...) - IQuerySession.PrefixSearchAsync<T(...) - IQueryable<T.Where(x = x.Search(term, regConfig)) and the matching PlainTextSearch / PhraseSearch / WebStyleSearch / PrefixSearch extension methods Details In the affected versions, FullTextWhereFragment renders the WHERE-clause SQL by string interpolation: regConfig arrives unchanged from the public API surface above. Any value containing a single quote terminates the SQL literal and lets an attacker append arbitrary PostgreSQL. Confirmed exploit shapes (with regConfig set to…

Published by the source

14 May 2026, 20:46 UTC

Last modified by the source

9 Jun 2026, 10:24 UTC

Source last checked

26 Oct 2026, 17:04 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-vmw2-qwm8-x84c

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# Patch Next advisory brief: CVE-2026-45288

Advisory: Marten has an injection vulnerability in its full-text search regConfig parameter
IDs: CVE-2026-45288, GHSA-vmw2-qwm8-x84c
Record: https://patchnext.com/advisories/cve-2026-45288 (revision 1, source checked 26 Oct 2026, 17:04 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: marten 8.37.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet marten: affected <= 8.36; fixed in 8.37.0

## Suggested inspection (read-only)
- NuGet marten: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on marten.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-vmw2-qwm8-x84c (GitHub-reviewed advisory GHSA-vmw2-qwm8-x84c lists affected ranges: NuGet marten >=0 <=8.36)

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