{"data":{"id":"5711055d-8660-4e3b-a057-7a4c14552b0a","title":"GHSA-5c57-rqjx-35g2: Cline Kanban Server has a Cross-Origin WebSocket Hijacking Vulnerability","summary":"The kanban npm package, used by the cline CLI, runs a WebSocket server on 127.0.0.1:3484 that does not validate the Origin header on its upgrade requests. Any website a developer visits can connect to the runtime, terminal I/O and control endpoints, leaking workspace paths, task details and agent chat messages. A page can also write input into a running agent's terminal, which the source says leads to remote code execution, or stop active agent sessions. Tested against version 0.1.59.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://github.com/advisories/GHSA-5c57-rqjx-35g2","publishedAt":"2026-05-08T20:43:17.000Z","cveId":"CVE-2026-44211","cweIds":null,"cvssScore":null,"cvssSeverity":"critical","severity":"critical","attackType":["other"],"issueType":"vulnerability","affectedPackages":["cline@<= 2.13.0"],"affectedPackageNames":["cline"],"affectedPackageRefs":["npm:cline"],"affectedVendors":[],"affectedVendorsRaw":["Cline","Cline Kanban Server","kanban npm package"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":"unknown","epssScore":0.0018,"epssCheckedAt":"2026-11-08T00:10:10.705Z","kevDateAdded":null,"advisoryAliases":["GHSA-5c57-rqjx-35g2"],"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":null,"disclosureDate":"2026-05-08T20:43:17.000Z","fixReleasedAt":null,"daysToFix":null,"fixCheckedAt":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":["confidentiality","integrity","availability"],"aiComponentTargeted":"agent","llmSpecific":false,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null,"fixes":[]}}