CVE-2026-61682
- Source
- https://cve.org/CVERecord?id=CVE-2026-61682
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61682.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-61682
- Aliases
- Published
- 2026-09-18T16:11:46Z
- Modified
- 2026-09-19T03:47:22Z
- Severity
-
- 9.9 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- 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
- Details
-
kcp is a Kubernetes-like control plane for form-factors and use-cases beyond Kubernetes and container workloads. Prior to 0.31.4 and 0.32.2, the kcp front-proxy does not remove inbound X-Remote-User, X-Remote-Group, or X-Remote-Extra-* identity headers before forwarding requests to shards. Any authenticated tenant can inject X-Remote-Group: system:masters, authorization.kcp.io/warrant, authentication.kcp.io/scopes, or a group used for per-workspace required-group gating, and the shard trusts these values as authenticated identity assertions. This allows cross-workspace impersonation, authorization bypass, and arbitrary reading, writing, or deletion of resources, secrets, RBAC data, APIExports, APIBindings, and LogicalClusters. This issue is fixed in versions 0.31.4 and 0.32.2.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-290", "CWE-302", "CWE-348" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61682.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61682.json
- https://github.com/kcp-dev/kcp/commit/7437cdcfec8f927d1a9bf1b2dd1e075d038e27ca
- https://github.com/kcp-dev/kcp/commit/f913ee890fb2fd9fa78e50c43474b078bfb6aeff
- https://github.com/kcp-dev/kcp/releases/tag/v0.31.4
- https://github.com/kcp-dev/kcp/releases/tag/v0.32.2
- https://github.com/kcp-dev/kcp/security/advisories/GHSA-c8w2-fgvx-vhv4
- https://nvd.nist.gov/vuln/detail/CVE-2026-61682
Affected packages
Git / github.com/kcp-dev/kcp
Affected ranges
- Type
- GIT
- Repo
- https://github.com/kcp-dev/kcp
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroducedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "introduced": "0" }, { "fixed": "0.31.4" }, { "introduced": "0.32.0" }, { "fixed": "0.32.2" } ], "source": "AFFECTED_FIELD" }