---
title: "CVE-2026-45288: Marten has an injection vulnerability in its full-text search regConfig parameter"
url: https://erroneo.us/security/cve/CVE-2026-45288/
description: "CVE-2026-45288 (Marten (NuGet)): Marten is a .NET Transactional Document DB and Event Store on PostgreSQL. Prior to 8.36.1, Marten's full-text search APIs…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-05-28
date_modified: 2026-06-09
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-45288"
kev: false
cvss: 9.8
epss: 0.0054
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-45288: Marten has an injection vulnerability in its full-text search regConfig parameter

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.5% , percentile 45: FIRST’s model estimates a 0.5% chance of exploitation activity in the next 30 days, higher than 45% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes Marten (NuGet) <= 8.36, fixed in 8.37.0 . Check your lockfile, including transitive dependencies.

## What it is

Marten is a .NET Transactional Document DB and Event Store on PostgreSQL. Prior to 8.36.1, 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. This vulnerability is fixed in 8.36.1.

## Affected packages

- NuGet `Marten` <= 8.36 → fixed: 8.37.0

## Affected products (CVE record)

- JasperFx marten: < 8.36.1

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.54% probability of exploitation activity in the next 30 days; percentile 45.

## Sources

- [GitHub Advisory GHSA-vmw2-qwm8-x84c](https://github.com/advisories/GHSA-vmw2-qwm8-x84c)
- [CVE.org record CVE-2026-45288](https://www.cve.org/CVERecord?id=CVE-2026-45288)
- [NVD entry CVE-2026-45288](https://nvd.nist.gov/vuln/detail/CVE-2026-45288)
- [github.com](https://github.com/JasperFx/marten/security/advisories/GHSA-vmw2-qwm8-x84c)
- [github.com](https://github.com/JasperFx/marten/pull/4343)
- [github.com](https://github.com/JasperFx/marten/commit/626249656829860b9c55895b5b6046b61a2a695f)

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Source page: https://erroneo.us/security/cve/CVE-2026-45288/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt