CVE-2026-56696 (GCVE-0-2026-56696)

Vulnerability from cvelistv5 – Published: 2026-06-23 15:36 – Updated: 2026-07-14 21:34 X_Open Source
VLAI
Title
OpenHarness - Prompt Injection via /issue and /pr_comments Slash Commands
Summary
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.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 15:45 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
HKUDS OpenHarness Affected: 0 , ≤ 0.1.9 (semver)
Unaffected: 27bb93b810e9ea8fa4832eab7152eeb3b4a6bffb (git)
    cpe:2.3:a:hkuds:openharness:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-05-24 00:00
Credits
Chia Min Jun Lennon
Show details on NVD website
To clipboard 

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Nomenclature

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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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