CVE-2026-59723: Cline is an autonomous coding agent as an SDK, IDE extension, or CLI assistant

Q: How do I fix CVE-2026-59723?

cline: upgrade to 3.0.30. Exact commands for each OS are on this page.

Q: Is CVE-2026-59723 being exploited?

CVE-2026-59723 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-59723 affect?

CVE-2026-59723 affects cline. Severity is high (CVSS 8.8). 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 validatin

Q: How urgent is CVE-2026-59723?

Priority 40/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2026-59723 is a high-severity flaw (CVSS 8.8) affecting cline. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-346
Published	2026-07-08
Last modified	2026-08-26

Publisher (CNA): GitHub, Inc. · Vendor: cline

Last updated 2026-08-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-08 23:16 UTCPublished CVE record published
2026-08-26 16:26 UTCUpdated Record last modified

cline cline UPGRADE

Affected: < 3.0.30

Fixed in: 3.0.30

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cline || rpm -q cline || cline --version

2. UPGRADE to 3.0.30 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cline

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cline

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59723?

cline: upgrade to 3.0.30. Exact commands for each OS are on this page.

Is CVE-2026-59723 being exploited?

CVE-2026-59723 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59723 affect?

CVE-2026-59723 affects cline. Severity is high (CVSS 8.8). 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 validatin

How urgent is CVE-2026-59723?

Priority 40/100. High severity; Public exploit reference

Related CVEs

CVE-2026-44211 CRITICAL 9.6 UPGRADE Cline is an autonomous coding agent as an SDK, IDE extension, or CLI assistant

References

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