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Medium · 5.4 CVE-2026-56696 EUVD-2026-38469GHSA-24cw-228q-3rx9PYSEC-2026-3880

OpenHarness - Prompt Injection via /issue and /pr_comments Slash Commands

Published Jun 23, 2026 · Updated Nov 8, 2026 · Assigned by VulnCheck

Description

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 products

VendorProductAffectedFixed
HKUDS OpenHarness ≤ 0.1.9 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI openharness-ai <= 0.1.9 — GHSA-24cw-228q-3rx9

References