CVE-2026-56695: OpenHarness remote resume commands expose other users' saved session snapshots

June 23, 2026 (updated September 4, 2026)

OpenHarness ohmo gateway /resume and /summary slash commands default remote_invocable to True, allowing admitted remote senders to enumerate and load arbitrary session snapshots by ID. Attackers can exploit this to access victim snapshots containing private prompts, credentials, tool output, and file paths via shared gateway channels.

References

github.com/HKUDS/OpenHarness/commit/92e298852c9b9c8c2266236292073623418c640a
github.com/HKUDS/OpenHarness/pull/276
github.com/advisories/GHSA-399c-3gm2-p29v
nvd.nist.gov/vuln/detail/CVE-2026-56695
www.vulncheck.com/advisories/openharness-cross-session-disclosure-via-resume-and-summary-commands

Code Behaviors & Features

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