---
id: CVE-2026-56696
aliases:
  - GHSA-24cw-228q-3rx9
  - PYSEC-2026-3880
title: OpenHarness remote project-context commands allow persistent prompt poisoning
summary: OpenHarness remote project-context commands allow persistent prompt poisoning
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
vendor: openharness-ai
product: openharness-ai
ecosystem: pip
affected:
  - openharness-ai <= 0.1.9
published: '2026-06-23'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T12:25:37.097640108Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-24cw-228q-3rx9'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56696'
  - url: 'https://github.com/HKUDS/OpenHarness/pull/272'
  - url: >-
      https://github.com/HKUDS/OpenHarness/commit/27bb93b810e9ea8fa4832eab7152eeb3b4a6bffb
  - url: 'https://github.com/HKUDS/OpenHarness'
  - url: >-
      https://www.vulncheck.com/advisories/openharness-prompt-injection-via-issue-and-pr-comments-slash-commands
  - url: 'https://pypi.org/project/openharness-ai'
  - url: 'https://github.com/advisories/GHSA-24cw-228q-3rx9'
tags:
  - osv
  - pip
epss: 0.0037
epssPercentile: 0.28241
ingestedAt: '2026-09-04T19:32:57.192Z'
---

## Overview

OpenHarness /issue and /pr_comments slash commands lack remote_invocable=False protection, allowing remote channel senders to write attacker-controlled Markdown into project context files. Admitted remote attackers can inject malicious content into .openharness/issue.md and .openharness/pr_comments.md files, which are subsequently injected into runtime system prompts, persistently influencing local agent behavior.

## Affected packages

- `openharness-ai <= 0.1.9`

## Remediation

Refer to the advisory for the patched release.