CVE-2026-59723
WebSocket origin-bypass in Cline dashboard enables remote command execution.
Is CVE-2026-59723 being exploited?
Not confirmed. CVE-2026-59723 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.21% probability of exploitation in the next 30 days.
How severe is CVE-2026-59723?
CVE-2026-59723 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-59723?
Yes. A fix has been recorded for CVE-2026-59723. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-59723 affect?
CVE-2026-59723 affects Cline Hub dashboard, cline CLI/IDE/SDK < 3.0.30, Local 127.0.0.1 dashboard binds. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-59723?
Upgrade to Cline 3.0.30; set ROOM_SECRET and restrict localhost dashboard access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker-controlled sites can send WebSocket frames to read workspace, change MCP/provider settings, and execute commands when ROOM_SECRET is unset on localhost binds.
Immediate action required
- affected< 3.0.30
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.