Vulnerability · Published Jun 23, 2026 · Assigned by VulnCheck
CVE-2026-56695OpenHarness - Cross-Session Disclosure via /resume and /summary Commands
Medium 6.5
In plain English
A medium-severity missing authorization in OpenHarness from HKUDS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 65.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | openharness-ai | no fix listed | GHSA-399c-3gm2-p29v |
| PyPI | openharness-ai | no fix listed | PYSEC-2026-3881 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| HKUDS | OpenHarness | 0 – through 0.1.9 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- Pull Request issue-tracking
- Patch Commit patch
- https://www.vulncheck.com/advisories/openharness-cross-session-disclosure-via-resume-and-summary-commands third-party-advisory