OpenHarness remote project-context commands allow persistent prompt poisoning
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | openharness-ai | <= 0.1.9 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-56696
- https://github.com/HKUDS/OpenHarness/pull/272
- https://github.com/HKUDS/OpenHarness/commit/27bb93b810e9ea8fa4832eab7152eeb3b4a6bffb
- https://github.com/HKUDS/OpenHarness
- https://www.vulncheck.com/advisories/openharness-prompt-injection-via-issue-and-pr-comments-slash-commands
- https://pypi.org/project/openharness-ai
- https://github.com/advisories/GHSA-24cw-228q-3rx9
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-862- Platform
- Python (PyPI)
- Package
openharness-ai- Disclosed
- 23.06.2026
- Updated
- 11.10.2026 15:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-3880 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-24cw-228q-3rx9 - CC BY 4.0
Vulnerability history: openharness-ai
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 06.2026 06.2026
- Without a fix
- 2
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2026: 2
-
OpenHarness remote project-context commands allow persistent prompt poisoning this entry
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