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CVE-2026-59723

Cline vulnerability

8.8 HIGHPublic exploitEPSS 0.25%
  1. Published8 Jul 2026

Description

Cline is an autonomous coding agent as an SDK, IDE extension, or CLI assistant. Prior to 3.0.30, the Cline Hub dashboard server launched by the cline dashboard command accepts WebSocket connections on the /browser endpoint without validating the Origin header, and when ROOM_SECRET is unset for local 127.0.0.1 binds, isAuthorizedBrowserRequest() allows attacker-controlled websites to send desktopCommand frames that read workspace state, mutate MCP and provider settings, and trigger command execution when a provider or model is configured. This issue is fixed in version 3.0.30.

CVSS 3.1 breakdown

Attack vectorAdjacent
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected products

Cline< 3.0.30

Remediation

Fixed in
Cline≥ 3.0.30

References

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Frequently asked

Is CVE-2026-59723 being actively exploited?

CVE-2026-59723 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.25%.

How severe is CVE-2026-59723?

CVE-2026-59723 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.25% probability of exploitation.

Which products are affected by CVE-2026-59723?

Affected products include Cline.

How do I fix CVE-2026-59723?

Upgrade affected software to a fixed version, for example Cline 3.0.30 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-59723 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.