{"id":"PYSEC-2026-3880","summary":"OpenHarness remote project-context commands allow persistent prompt poisoning","details":"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.","aliases":["CVE-2026-56696","GHSA-24cw-228q-3rx9"],"modified":"2026-09-10T12:15:10.954896187Z","published":"2026-09-10T09:44:50.124425Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56696"},{"type":"WEB","url":"https://github.com/HKUDS/OpenHarness/pull/272"},{"type":"WEB","url":"https://github.com/HKUDS/OpenHarness/commit/27bb93b810e9ea8fa4832eab7152eeb3b4a6bffb"},{"type":"PACKAGE","url":"https://github.com/HKUDS/OpenHarness"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/openharness-prompt-injection-via-issue-and-pr-comments-slash-commands"},{"type":"PACKAGE","url":"https://pypi.org/project/openharness-ai"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-24cw-228q-3rx9"}],"affected":[{"package":{"name":"openharness-ai","ecosystem":"PyPI","purl":"pkg:pypi/openharness-ai"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.1.9"}]}],"versions":["0.1.0","0.1.1","0.1.2","0.1.3","0.1.4","0.1.5","0.1.6","0.1.7","0.1.8","0.1.9"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/openharness-ai/PYSEC-2026-3880.yaml"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"type":"CVSS_V4","score":"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"}]}