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GHSA-C8W2-FGVX-VHV4 kcp front-proxy does not strip inbound X-Remote-* identity headers, allowing any authenticated client to inject groups/warrants and impersonate system:masters in any workspace

🗓️ 18 Sep 2026 17:15:49Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 2 Views

Summary The kcp front-proxy fails to strip client-supplied identity headers before forwarding requests to shards. Any authenticated tenant can inject their own X-Remote-Group and X-Remote-Extra-* headers, which the shard trusts as a verified ident...

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18 Sep 2026 17:30Current
CVSS 3.19.9
2