Unrated severityNVD Advisory· Published Jun 23, 2026· Updated Jun 23, 2026
OpenHarness - Prompt Injection via /issue and /pr_comments Slash Commands
CVE-2026-56696
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1Patches
Vulnerability mechanics
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References
3- github.com/HKUDS/OpenHarness/commit/27bb93b810e9ea8fa4832eab7152eeb3b4a6bffbmitrepatch
- www.vulncheck.com/advisories/openharness-prompt-injection-via-issue-and-pr-comments-slash-commandsmitrethird-party-advisory
- github.com/HKUDS/OpenHarness/pull/272mitreissue-tracking
News mentions
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