CVE-2026-56696

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/HKUDS/OpenHarness/commit/27bb93b810e9ea8fa4832eab7152eeb3b4a6bffb
https://github.com/HKUDS/OpenHarness/pull/272
https://www.vulncheck.com/advisories/openharness-prompt-injection-via-issue-and-pr-comments-slash-commands
https://github.com/HKUDS/OpenHarness/pull/272

Configurations

No configuration.

History

23 Jun 2026, 17:17

Type	Values Removed	Values Added
References	~~() https://github.com/HKUDS/OpenHarness/pull/272 -~~	() https://github.com/HKUDS/OpenHarness/pull/272 -

23 Jun 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-23 16:17

Updated : 2026-06-23 17:58

NVD link : CVE-2026-56696

Mitre link : CVE-2026-56696

CVE.ORG link : CVE-2026-56696

JSON object : View

Products Affected

No product.

CWE

CWE-862

Missing Authorization

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