CVE-2026-56696: OpenHarness - Prompt Injection via /issue and /pr_comments Slash Commands

Published Jun 23, 2026
·
Updated

OpenHarness /issue and /prcomments slash commands lack remoteinvocable=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/prcomments.md files, which are subsequently injected into runtime system prompts, persistently influencing local agent behavior.

Affected Software

1 affected component
OpenHarness OpenHarness

Event History

Jun 23, 2026
CVE Published
via MITRE·03:36 PM
Data Sourced
via MITRE·03:36 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·04:17 PM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2026-56696?

CVE-2026-56696 has a medium severity score of 5.4.

2

What are the potential impacts of CVE-2026-56696?

CVE-2026-56696 allows remote attackers to inject malicious Markdown into project context files.

3

How do I fix CVE-2026-56696?

To fix CVE-2026-56696, implement protection measures to ensure that remote invocable commands are properly restricted.

4

What software is affected by CVE-2026-56696?

CVE-2026-56696 affects the OpenHarness software platform.

5

Can CVE-2026-56696 be exploited remotely?

Yes, CVE-2026-56696 can be exploited remotely by attackers with access to remote channels.

Company

Resources

Contact

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CVE-2026-56696 - OpenHarness - Prompt Injection via /issue and /pr_comments Slash Commands - SecAlerts